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Britain's Prince William (R) and Catherine, Duchess of Cambridge, leave after they attended 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)

Britain's Prince William (R) and Catherine, Duchess of Cambridge, leave after they attended 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)

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Britain's Prince Harry, (L) talks with Catherine, Duchess of Cambridge, after they attended 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)

Britain's Prince Harry, (L) talks with Catherine, Duchess of Cambridge, after they attended 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)

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Catherine, Duchess of Cambridge and Prince Harry depart for the Royal wedding of Zara Phillips and Mike Tindall at Canongate Kirk on July 30, 2011 in Edinburgh, Scotland.

Catherine, Duchess of Cambridge and Prince Harry depart for the Royal wedding of Zara Phillips and Mike Tindall at Canongate Kirk on July 30, 2011 in Edinburgh, Scotland.

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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 II, 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)

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 II, 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)

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Catherine, Duchess of Cambridge, Prince William, Duke of Cambridge and Prince Harry attend the wedding of Zara Phillips and Mike Tindall at Canongate Kirk on July 30, 2011 in Edinburgh, Scotland.

Catherine, Duchess of Cambridge, Prince William, Duke of Cambridge and Prince Harry attend the wedding of Zara Phillips and Mike Tindall at Canongate Kirk on July 30, 2011 in Edinburgh, Scotland.