LONDON, UNITED KINGDOM - JUNE 03: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Prince William, Duke of Cambridge Prince Harry and Catherine, Duchess of Cambridge onboard the Royal Barge 'Spirit of Chartwell' during the Diamond Jubilee Thames River Pageant on June 3, 2012 in London, England. For only the second time in its history the UK celebrates the Diamond Jubilee of a monarch. Her Majesty Queen Elizabeth II celebrates the 60th anniversary of her ascension to the throne. Thousands of well-wishers from around the world have flocked to London to witness the spectacle of the weekend's celebrations. The Queen along with all members of the royal family will participate in a River Pageant with a flotilla of a 1,000 boats accompanying them down the Thames. (Photo by Indigo/Getty Images)