LONDON, ENGLAND - JUNE 11: HM Queen Elizabeth II and Prince Philip, the Duke of Edinburgh wave to the crowd as she celebrates her official birthday by taking part in the Trooping the Colour parade on... more 
LONDON, ENGLAND - JUNE 11: HM Queen Elizabeth II and Prince Philip, the Duke of Edinburgh wave to the crowd as she celebrates her official birthday by taking part in the Trooping the Colour parade on June 11, 2011 in London, England. The ceremony of Trooping the Colour is believed to have first been performed during the reign of King Charles II. In 1748, it was decided that the parade would be used to mark the official birthday of the Sovereign. More than 600 guardsmen and cavalry make up the parade, a celebration of the Sovereign's official birthday, although the Queen's actual birthday is on 21 April. (Photo by Oli Scarff/Getty Images) less 
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Getty Images | Photo By Oli Scarff / Getty Images
Sat, Jun 11, 2011 9:25 AM EDT