Their Royal Highnesses Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge greet well-wishers from the balcony at Buckingham Palace on April 29, 2011 in London, England. The marriage of the second in line to the British throne was led by the Archbishop of Canterbury and was attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding. (Photo by Peter Macdiarmid/Getty Images)

Their Royal Highnesses Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge kiss on the balcony at Buckingham Palace on April 29, 2011 in London, England. (Photo by Peter Macdiarmid/Getty Images)

Well wishers with flags and banners surge along the Mall behind the police towards Buckingham Palace to celebrate the Royal Wedding of Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge at Westminster Abbey on April 29, 2011 in London, England. (Photo by Christopher Furlong/Getty Images)

Their Royal Highnesses Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge greet well-wishers from the balcony at Buckingham Palace on April 29, 2011 in London, England. (Photo by Peter Macdiarmid/Getty Images)