Happy 30th Birthday - Duchess of Cambridge

LONDON, ENGLAND - JANUARY 08: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the UK premiere of War Horse at Odeon Leicester Square on January 8, 2012 in London, England. (Photo by Tim Whitby/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

LONDON, ENGLAND - JANUARY 08: Catherine, Duchess of Cambridge attends the UK premiere of War Horse at Odeon Leicester Square on January 8, 2012 in London, England. (Photo by Tim Whitby/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

LONDON, ENGLAND - JANUARY 08: Catherine, Duchess of Cambridge attends the UK premiere of War Horse at the Odeon Leicester Square on January 8, 2012 in London, England. (Photo by Ian Gavan - WPA Pool /Getty Images)

Happy 30th Birthday - Duchess of Cambridge

LONDON, ENGLAND - JANUARY 08: Catherine, Duchess of Cambridge attends the UK premiere of War Horse at the Odeon Leicester Square on January 8, 2012 in London, England. (Photo by Ian Gavan - WPA Pool /Getty Images)

Happy 30th Birthday - Duchess of Cambridge

Catherine, the Duchess of Cambridge, arrives to attend the Royal family Christmas Day church service at St Mary Magdalene Church in Sandringham, Norfolk, eastern England, on December 25, 2011. Britain's Prince Philip missed the royal family's Christmas Day celebrations for the first time as the husband of Queen Elizabeth II remained in hospital after having heart surgery. AFP PHOTO / BEN STANSALL (Photo credit should read BEN STANSALL/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

Catherine, the Duchess of Cambridge (L), arrives to attend the Royal family Christmas Day church service at St Mary Magdalene Church in Sandringham, Norfolk, eastern England, on December 25, 2011. Britain's Prince Philip missed the royal family's Christmas Day celebrations for the first time as the husband of Queen Elizabeth II remained in hospital after having heart surgery. AFP PHOTO / BEN STANSALL (Photo credit should read BEN STANSALL/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

Britain's Camilla, Duchess of Cornwall (L), Prince Charles, Prince of Wales (2nd L) Catherine, Duchess of Cambridge (2nd R) and Prince William, Duke of Cambridge (R) leave following the Royal family Christmas Day church service at St Mary Magdalene Church in Sandringham, Norfolk, in the east of England, on December 25, 2011. Britain's Prince Philip missed the royal family's Christmas Day celebrations for the first time as the husband of Queen Elizabeth II remained in hospital after having heart surgery. AFP PHOTO/BEN STANSALL (Photo credit should read BEN STANSALL/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

<> at Sandringham on December 25, 2011 in King's Lynn, England.

Happy 30th Birthday - Duchess of Cambridge

Duchess of Cambridge arrives at the 2011 Sun Military Awards at Imperial War Museum on December 19, 2011 in London. AFP PHOTO/ WPA POOL/ JOHN STILLWELL (Photo credit should read JOHN STILLWELL/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

LONDON, ENGLAND - DECEMBER 19: Catherine, Duchess of Cambridge and Prince Harry attend The Sun Military Awards at Imperial War Museum on December 19, 2011 in London, England. (Photo by John Stillwell- WPA Pool/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

<> on December 19, 2011 in London, England.

Happy 30th Birthday - Duchess of Cambridge

Britain's Prince William, Duke of Cambridge, and his wife the Duchess of Cambridge, arrive at Centrepoint's Camberwell Foyer in London on December 21, 2011. The national charity, Centrepoint, provides housing and support to improve the lives of homeless young people aged 16-25. AFP PHOTO /CARL COURT (Photo credit should read CARL COURT/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

LONDON, ENGLAND - DECEMBER 21: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge visit homeless charity 'Centrepoint' at its Camberwell Foyer on December 21, 2011 in London, England. (Photo by Chris Jackson/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

<> on November 13, 2011 in UNSPECIFIED, United Kingdom.

Happy 30th Birthday - Duchess of Cambridge

Catherine, Britain's Duchess of Cambridge (C) talks to people at a dinner reception in aid of the National Memorial Arboretum Appeal at St James's Palace, in London, on November 10, 2011. The Appeal was launched in April 2009 by its Patron, The Duke of Cambridge, to develop the Arboretum into a world-renowned centre for Remembrance and to ensure that there are necessary facilities for the 300,000 visiting families, servicemen and women, veterans and members of the public each year. AFP PHOTO/WPA POOL/ LEFTERIS PITARAKIS (Photo credit should read LEFTERIS PITARAKIS/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

Britain's Prince William (L) and Catherine, Duchess of Cambridge (R) arrive to attend a dinner reception in aid of the National Memorial Arboretum Appeal at St James's Palace, in London, on November 10, 2011. The Appeal was launched in April 2009 by its Patron, The Duke of Cambridge, to develop the Arboretum into a world-renowned centre for Remembrance and to ensure that there are necessary facilities for the 300,000 visiting families, servicemen and women, veterans and members of the public each year. AFP PHOTO/WPA POOL/ LEFTERIS PITARAKIS (Photo credit should read LEFTERIS PITARAKIS/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

at Royal Marsden Hospital on September 29, 2011 in Sutton, Greater London.

Happy 30th Birthday - Duchess of Cambridge

Britain's Catherine, (L) the Duchess of Cambridge, arrives with her husband Prince William, (R) as they prepare to open a children's cancer unit at the Royal Marsden Hospital in Sutton, in south-east England, on September 29, 2011. AFP PHOTO/BEN STANSALL (Photo credit should read BEN STANSALL/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

Britain's Catherine, the Duchess of Cambridge, arrives at the Machan Express Coffee bar in the centre of Birmingham on August 19, 2011, which was ransacked during the recent riots in the area. Britain's Prince William and his wife Catherine on Friday visited the district of Birmingham where three men were killed during riots which rocked England last week. The Duke and Duchess of Cambridge met the parents of the men of South Asian descent who were killed when they were mown down by a car in the ethnically mixed Winson Green area of Britain's second city. AFP PHOTO / DAVID JONES/POOL (Photo credit should read DAVID JONES/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

Britain's Catherine, Duchess of Cambridge, arrives for the wedding between England rugby player Mike Tindall and Zara Phillips, the eldest granddaughter of Britain's Queen Elizabeth, at Canongate Kirk in Edinburgh, Scotland July 30, 2011. The couple, both world-beating sports stars, tie the knot at Edinburgh's Canongate Kirk in a private ceremony mid-afternoon that has little in common with that of Phillips' cousin, Prince William, when he married the former Kate Middleton three months ago. AFP PHOTO / DYLAN MARTINEZ/POOL (Photo credit should read DYLAN MARTINEZ/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

Britain's Prince Harry, (L) Princess Beatrice, (2nd Row 2nd L) Catherine, Duchess of Cambridge (C) and Prince William (R) leave after attending the wedding between England rugby player Mike Tindall and Britain's Zara Phillips, granddaughter of Queen Elizabeth II, at Canongate Kirk in Edinburgh, Scotland, on July 30, 2011. AFP PHOTO / DYLAN MARTINEZ/POOL (Photo credit should read DYLAN MARTINEZ/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

Britain's Queen Elizabeth II (L) talks with Catherine, the Duchess of Cambridge as they view the dress she wore for her royal wedding to Britain's Prince William at the annual summer exhibition at Buckingham Palace in central London, on July 22, 2011. Britain's Queen Elizabeth II has reportedly described as "creepy" a new exhibition featuring the wedding dress worn by the former Kate Middleton when she married Prince William in April. The Alexander McQueen dress is being exhibited on a headless mannequin in the ballroom at Buckingham Palace, with the tiara and veil that the now Duchess of Cambridge wore, suspended above it. AFP PHOTO / JOHN STILLWELL / WPA POOL (Photo credit should read JOHN STILLWELL/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

Britain's Catherine, the Duchess of Cambridge, kisses her husband Prince William following a polo match at the Santa Barbara Polo and Racquet Club for a charity event held in support of the American Friends of The Foundation of Prince William and Prince Harry in Santa Barbara, California July 9, 2011. AFP PHOTO / Pool / Alex GALLARDO (Photo credit should read Alex Gallardo/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

Catherine, the Duchess of Cambridge, smiles at her husband Britain's Prince William as they arrive at the Mission Serve "Hiring Our Heroes Los Angeles job fair for veterans and military spouses held at the Sony Pictures Studios in Culver City, California, USA 10 July 2011. AFP PHOTO / Pool / Jae C. Hong (Photo credit should read Jae C. Hong/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge arrive at Inner City Arts on July 10, 2011 in Los Angeles, California.

Happy 30th Birthday - Duchess of Cambridge

Britain's Prince William and his wife Catherine, Duchess of Cambridge, exchange conversation as they sit down to paint a picture during their tour of the Inner City Arts campus in Los Angeles, California, on July 10, 2011. Prince William and his wife Catherine are on a royal visit to California from July 8 to July 10. AFP PHOTO/Alex Gallardo/Pool (Photo credit should read Alex Gallardo/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

The Duchess of Cambridge arrives at the BAFTA Brits to watch event held at the Belasco Theatre in Los Angeles, California, USA. PRESS ASSOCIATION Photo. Picture date: Saturday July 9, 2011. See PA story ROYAL California. Photo credit should read: Mark Large/Daily Mail/PA Wire

Happy 30th Birthday - Duchess of Cambridge

The Duke and Duchess of Cambridge celebrate after Prince William played in a charity polo match scoring four goals and winning the game, at Santa Barbara Polo Club, California, USA. PRESS ASSOCIATION Photo. Picture date: Saturday July 9, 2011. The newlywed royal couple are on a twelve day visit to Canada and the United States. See PA story ROYAL California. Photo credit should read: Ian Vogler/PA Wire

Happy 30th Birthday - Duchess of Cambridge

arrives at the BAFTA Brits To Watch event held at the Belasco Theatre on July 9, 2011 in Los Angeles, California.

Happy 30th Birthday - Duchess of Cambridge

<> on July 8, 2011 in Calgary, Canada.

Happy 30th Birthday - Duchess of Cambridge

<> on July 9, 2011 in Santa Barbara, California.

Happy 30th Birthday - Duchess of Cambridge

Catherine, the Duchess of Cambridge looks on as British Prince William plays street hockey during a event at the Somba K'e Civic Plaza in Yellowknife, Northwest Territories on their nine-day tour in Canada July 5, 2011. AFP PHOTO / TIMOTHY A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

Catherine, Duchess of Cambridge, smiles during a meeting with veterans at the War Museum in Ottawa on July 2, 2011, on the third d ay of a nine-day tour of Canada with her husband Britain's Prince William. AFP PHOTO/GEOFF ROBINS (Photo credit should read GEOFF ROBINS/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

Prince William and his wife, Catherine, the Duchess of Cambridge, arrive on Parliament Hill on Ottawa during Canada Day celebrations on the second day of their nine-day tour of Canada on July 1, 2011. AFP PHOTO / TIMOTHY A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

Catherine Duchess of Cambridge
Prince William and Catherine Duchess of Cambridge Tour of the United States - Reception at the Hancock Park home of the British Consulate General in Los Angeles, California on July 8, 2011.

Los Angeles, California

Photo © Matt Baron/BEImages

Happy 30th Birthday - Duchess of Cambridge

Prince William and Catherine, the Duchess of Cambridge, arrive at Los Angeles International Airport July 8, 2011. Prince William and his new bride Catherine arrived in Los Angeles for a weekend of Hollywood glamour and Californian sun, after a nine-day tour of Canada. AFP PHOTO / Robyn Beck (Photo credit should read ROBYN BECK/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

attends Variety's Venture Capital and New Media Summit during their North American Royal visit held at The Beverly Hilton hotel on July 8, 2011 in Beverly Hills, California.

Happy 30th Birthday - Duchess of Cambridge

<> on July 8, 2011 in Calgary, Canada.

Happy 30th Birthday - Duchess of Cambridge

CALGARY, AB - JULY 08: Catherine, Duchess of Cambridge visits a reception at Calgary Zoo on July 8, 2011 in Calgary, Canada. The newly married Royal Couple are on the ninth day of their first joint overseas tour. The 12 day visit to North America is taking in some of the more remote areas of the country such as Prince Edward Island, Yellowknife and Calgary. The Royal couple started off their tour by joining millions of Canadians in taking part in Canada Day celebrations which mark Canada's 144th Birthday. (Photo by Chris Jackson/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

CALGARY, AB - JULY 08: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge (not in frame) attend the lauch of the Calgary Stampede on July 8, 2011 in Calgary, Canada. The newly married Royal Couple are on the eighth day of their first joint overseas tour. The 12 day visit to North America is taking in some of the more remote areas of the country such as Prince Edward Island, Yellowknife and Calgary. The Royal couple started off their tour by joining millions of Canadians in taking part in Canada Day celebrations which mark Canada's 144th Birthday. (Photo by Phil Noble - Pool/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

<> on July 7, 2011 in Calgary, Canada.

Happy 30th Birthday - Duchess of Cambridge

<> on July 7, 2011 in Calgary, Canada.

Happy 30th Birthday - Duchess of Cambridge

POOL POHOTO FOR REUTERS AND GETTY ONLY, NOT ROTA BASKET.
The Duchess of Cambridge talks to Riley Oldford aged 8, at Yellowknife Airport before boarding a plane to leave the north west Canada, this morning. PRESS ASSOCIATION Photo. Picture date: Wednesday July 6, 2011. See PA story. Photo credit should read:John Stillwell/PA

Happy 30th Birthday - Duchess of Cambridge

YELLOWKNIFE, NT - JULY 05: Catherine, Duchess of Cambridge laughs during an official welcome ceremony at the Somba K'e Civic Plaza on July 5, 2011 in Yellowknife, Canada. The newly married Royal Couple are on the sixth day of their first joint overseas tour. The 12 day visit to North America is taking in some of the more remote areas of the country such as Prince Edward Island, Yellowknife and Calgary. The Royal couple started off their tour by joining millions of Canadians in taking part in Canada Day celebrations which mark Canada's 144th Birthday. (Photo by Chris Jackson/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

Britain's Prince William and his wife Catherine, Duchess of Cambridge, as they depart the Legislative Assemby in Yellowknife, Northwest Territories, on their nine-day tour of Canada on July 5, 2011. AFP PHOTO / TIMOTHY A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

British Prince William and Catherine, the Duchess of Cambridge receive hockey jerseys during a street hockey event at the Somba K'e Civic Plaza in Yellowknife, Northwest Territories on their nine-day tour in Canada July 5, 2011. AFP PHOTO / TIMOTHY A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

CHARLOTTETOWN, PE - JULY 04: Catherine, Duchess of Cambridge looks on as Prince William, Duke of Cambridge takes part in helicopter manouvres called 'water birding' across Dalvay lake on July 4, 2011 in Charlottetown, Canada. The newly married Royal Couple are on the fifth day of their first joint overseas tour. The 12 day visit to North America is taking in some of the more remote areas of the country such as Prince Edward Island, Yellowknife and Calgary. The Royal couple started off their tour by joining millions of Canadians in taking part in Canada Day celebrations which mark Canada's 144th Birthday. (Photo by Arthur Edwards - Pool/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

MONTREAL, CANADA - JULY 2: Catherine, Duchess of Cambridge takes part in a cooking workshop at the Institut De Tourisme et D'hotellerie Du Quebec on July 2, 2011 in Montreal, Canada. The newly married Royal Couple are on the third day of their first joint overseas tour. The 12 day visit to North America will take in some of the more remote areas of the country such as Prince Edward Island, Yellowknife and Calgary. The Royal couple started off their tour by joining millions of Canadians in taking part in Canada Day celebrations which mark Canada's 144th Birthday. (Photo by David Rose - Pool/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

PRINCE EDWARD ISLAND, PE - JULY 04: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge visit Province House on July 5, 2011 in Charlottetown, Canada. The newly married Royal Couple are on the fifth day of their first joint overseas tour as they visited Pronvince House, the location for the Charlottestown conference of 1864 where the idea of the nation of Canada forged. The 12 day visit to North America is taking in some of the more remote areas of the country such as Prince Edward Island, Yellowknife and Calgary. The Royal couple started off their tour by joining millions of Canadians in taking part in Canada Day celebrations which mark Canada's 144th Birthday. (Photo by Ian Vogler - Pool/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

<> on July 3, 2011 in Quebec City, Canada.

Happy 30th Birthday - Duchess of Cambridge

Catherine, Duchess of Cambridge, greets members of the Canadian navy after disembarking the HMCS Montreal in Quebec City on July 3, 2011. Prince William and his wife Catherine are on a royal tour from June 30 to July 8. AFP PHOTO/Christinne Muschi/Pool (Photo credit should read CHRISTINNE MUSCHI/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

<> on July 3, 2011 in Quebec City, Canada.

Happy 30th Birthday - Duchess of Cambridge

A Newsweek magazine is viewed on June 29, 2011 in Washington, DC from the July 4 and 11, 2011 double issue of "Newsweek" featuring a cover photo that shows a computer-generated image of Princess Diana walking with Kate Middleton to depict what she might have looked like on her fiftieth birthday on July 1, 2011. The article inside was written by Diana biographer Tina Brown. Many readers believe the image to be tacky. AFP PHOTO / Karen BLEIER (Photo credit should read KAREN BLEIER/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

<> on July 2, 2011 in Montreal, Canada.

Happy 30th Birthday - Duchess of Cambridge

OTTAWA, CANADA - JULY 1: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge arrive for the Evening National Canada Day Celebrations in the capital accompanied by representatives of the National Capitol Commission on July 1, 2011 in Ottawa, Canada. (Photo by Pool/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

OTTAWA, ON - JULY 1: Catherine, Duchess of Cambridge attends Canada Day Celebrations at Parliament Hill on day 2 of the Royal Couple's North American Tour on July 1, 2011 in Ottawa, Canada. (Photo by Mark Large - Pool/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

OTTAWA, ON - JULY 01: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge arrive at Parliament Hill for Canada Day Celebrations on July 1, 2011 in Ottawa, Canada. The newly married Royal Couple are on the second day of their first joint overseas tour. Ottawa is the start of a 12 day visit to North America which will take in some of the more remote areas of the country such as Prince Edward Island, Yellowknife and Calgary. The Royal couple will be joining millions of Canadians in taking part in today's Canada Day celebrations which mark Canada's 144th Birthday. (Photo by Chris Jackson/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

OTTAWA, ON - JUNE 30: The Duchess of Cambridge during an informal reception for young Canadian volunteers in the official residence of the Governor General of Canada, Rideau Hall in Ottawa, on the first day of her visit to the Commonwealth country. The Royal couple will also join millions of Canadians to take part in tomorrow's Canada Day celebrations which mark Canada's 144th Birthday. (Photo by John Stillwell-Pool/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

POOL PHOTOGRAPH FOR GETTY & REUTERS ONLY.
The Duchess of Cambridge smiles as she listens to her husband the Duke of Cambridge promise to improve his French, as he makes a short adress after arriving at the Rideau Hall in Ottawa Canada, this afternoon. PRESS ASSOCIATION Photo. Picture date: Thursday June 30 , 2011. The Royal couple arrived in the capital of Canada, at the start of a eight day tour of the north American country. See PA story. Photo credit should read:John Stillwell/PA

Happy 30th Birthday - Duchess of Cambridge

Kate, The Duchess of Cambridge speaks with soldiers in Victoria Barracks in Windsor, west of London, on June 25, 2011, during a medal parade for the 1st Battalion Irish Guards Regiment. AFP PHOTO / POOL / CARL COURT (Photo credit should read CARL COURT/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

Catherine, the Duchess of Cambridge, (R) speaks to other members in the Royal Box as they watch Spanish player Rafael Nadal challenge Argentina's Juan Martin Del Potro in a Men's Singles match at the 2011 Wimbledon Tennis Championships at the All England Tennis Club, in south-west London, on June 27, 2011. AFP PHOTO/GLYN KIRK/RESTRICTED TO EDITORIAL USE (Photo credit should read GLYN KIRK/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

Catherine, the Duchess of Cambridge, (Front C) takes part in a 'Mexican Wave' as her husband Prince William (Front R) looks on as they watch Spanish player Rafael Nadal challenge Argentina's Juan Martin Del Potro in a Men's Singles match at the 2011 Wimbledon Tennis Championships at the All England Tennis Club, in south-west London, on June 27, 2011. AFP PHOTO/GLYN KIRK/RESTRICTED TO EDITORIAL USE (Photo credit should read GLYN KIRK/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

WINDSOR, ENGLAND - JUNE 25: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge visit Victoria Barracks during a medal parade for the 1st Battalion Irish Guards Regiment on June 25, 2011, in Windsor, United Kingdom . (Photo by Carl Court - WPA Pool/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

LONDON, UNITED KINGDOM - JUNE 3: (EDITORIAL USE ONLY) In this handout image supplied by St James's Palace, Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge pose for the official tour portrait for their trip to Canada and California in the Garden's of Clarence House on June 3, 2011 in London. England. The newly married Royal Couple will be undertaking their first official joint tour to Canada and California from June 30th. The trip will begin with Canada Celebrations in Ottawa and include highlights such as the Calgary Stampede and a visit to Yellowknife. (Photo by Chris Jackson / Getty Images for St James's Palace)

Happy 30th Birthday - Duchess of Cambridge

Britain's Duchess of Cambridge Catherine smiles as she arrives for a charity gala dinner, her first official royal engagement at Kensington Palace in London on June 9, 2011. The couple are attending a dinner in aid of a childrens charity, ARK (Absolute Return for Kids). AFP PHOTO/ ADRIAN DENNIS (Photo credit should read ADRIAN DENNIS/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

WINDSOR, ENGLAND - JUNE 13: Catherine, Duchess of Cambridge watches the Garter Service pass by on June 13, 2011 in Windsor, England. The Order of the Garter is the senior and oldest British Order of Chivalry, founded by Edward III in 1348. Membership in the order is limited to the sovereign, the Prince of Wales, and no more than twenty-four members. (Photo by Kirsty Wigglesworth/WPA Pool/ Getty Imagesl)

Happy 30th Birthday - Duchess of Cambridge

<> on June 11, 2011 in London, England.

Happy 30th Birthday - Duchess of Cambridge

Britain's Prince William and wife Kate, Duchess of Cambridge wave as they travel in the 1902 State Landau carriage along the Processional Route to Buckingham Palace, in London on April 29, 2011.AFP PHOTO/DIMITAR DILKOFF (Photo credit should read DIMITAR DILKOFF/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

A combo of images showing Kate, Duchess of Cambridge's wedding dress and jewellery as she steps out of Westminster Abbey in London, after marrying Britain's Prince William on April 29, 2011. AFP PHOTO (Photo credit should read --/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

Combo picture shows the wedding ceremony of Britain's Prince William and Kate Middleton in London on April 29, 2011. AFP PHOTO (Photo credit should read - -/AFP/Getty Images)

Happy 30th Birthday - Duchess of Cambridge

The Duke and Duchess of Cambridge walk hand in hand from Buckingham Palace in London the day after their wedding. PRESS ASSOCIATION Photo. Picture date: Saturday April 30, 2011. See PA story ROYAL Wedding. Photo credit should read:John Stillwell/PA