TRH Prince William, Duke of Cambridge and Catherine Middleton, Duchess of Cambridge kiss on the balcony of Buckingham Palace following their wedding on April 29, 2011 in London, England. (Photo by Anwar Hussein/WireImage)
Getty Images

WireImage Anwar Hussein

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

WireImage George Pimentel

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge greet wellwishers from the balcony next to Grace Van Cutsem (L) and Margarita Armstrong-Jones at Buckingham Palace on April 29, 2011 in London, England. (Photo by George Pimentel/WireImage)
Getty Images

WireImage George Pimentel

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge greet well-wishers next to members of their family on the balcony at Buckingham Palace on April 29, 2011 in London, England. (Photo by George Pimentel/WireImage)
Getty Images

WireImage George Pimentel