Prince William of Wales arrives to attend his Royal Wedding to Catherine Middleton at Westminster Abbey on April 29, 2011 in London, England. The marriage of the second in line to the British throne is to be led by the Archbishop of Canterbury and will be 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 Chris Jackson/Getty Images)

HRH Queen Elizabeth II greets The Right Reverend Dr John Hall, Dean of Westminster as she arrives to attend the Royal Wedding of Prince William to Catherine Middleton at Westminster Abbey on April 29, 2011 in London, England. (Photo by Dan Kitwood/Getty Images)

Catherine Middleton arrives in a car with her father Michael Middleton to attend the Royal Wedding of Prince William to Catherine Middleton at Westminster Abbey on April 29, 2011 in London, England. (Photo by Paul Gilham/Getty Images)

Catherine Middleton and her father Michael Middleton travel past Buckingham Palace as they make their way to the Royal Wedding of Prince William to Catherine Middleton at Westminster Abbey on April 29, 2011 in London, England. (Photo by Peter Macdiarmid/Getty Images)

Catherine Middleton arrives to attend the Royal Wedding of Prince William to Catherine Middleton at Westminster Abbey on April 29, 2011 in London, England. (Photo by Pascal Le Segretain/Getty Images)

Sister of the bride and Maid of Honour Pippa Middleton holds hands with Grace Van Cutsem and Eliza Lopes as they arrive to attend the Royal Wedding of Prince William to Catherine Middleton at Westminster Abbey on April 29, 2011 in London, England. (Photo by Pascal Le Segretain/Getty Images)

Catherine Middleton with the father Michael Middleton and Maid of Honour Pippa Middleton arrive to attend her Royal Wedding to Prince William at Westminster Abbey on April 29, 2011 in London, England. (Photo by Chris Jackson/Getty Images)

A crowd of spectators take photographs near to Buckingham Palace prior to the Royal Wedding of Prince William to Catherine Middleton at Westminster Abbey on April 29, 2011 in London, England. (Photo by Peter Macdiarmid/Getty Images)

Catherin Middleton arrives with her father Michael Middleton to join Prince William and Prince Harry in Westminster Abbey during the Royal Wedding of Prince William to Catherine Middleton at Westminster Abbey on April 29, 2011 in London, England. (Photo by Anthony Devlin - WPA Pool/Getty Images)

Prince William exchanges rings with his bride Catherine Middleton in front of the Archbishop of Canterbury Rowan Williams inside Westminster Abbey on April 29, 2011 in London, England. The marriage of Prince William, the second in line to the British throne, to Catherine Middleton is being held in London today. The marriage of the second in line to the British throne is to be led by the Archbishop of Canterbury and will be 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 Dominic Lipinski - WPA Pool/Getty Images)

Prince William and Catherine Middleton during their wedding service in Westminster Abbey ahead of the Royal Wedding of Prince William to Catherine Middleton at Westminster Abbey on April 29, 2011 in London, England. (Photo by Anthony Devlin - WPA Pool/Getty Images)

TRH Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge smile following their marriage at Westminster Abbey on April 29, 2011 in London, England. (Photo by Chris Jackson/Getty Images)

TRH Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge smile at the cheering crowds as they make the journey by carriage procession to Buckingham Palace following their marriage at Westminster Abbey on April 29, 2011 in London, England. (Photo by Christopher Furlong/Getty Images)

Catherine, Duchess of Cambridge smiles following her marriage to Prince William, Duke of Cambridge at Westminster Abbey on April 29, 2011 in London, England. (Photo by Chris Jackson/Getty Images)