Britain's Catherine, Duchess of Cambridge, laughs as she leaves St George's chapel after the annual service of the Order of the Garter at Windsor Castle in Berkshire on June 18, 2012. The Queen was joined by members of the royal family for the annual Order of the Garter service. The Order of the Garter is the pinnacle of the UK honours system with appointments of Knights of the Garter a perogative of the Queen, and a gift that is made without consulting ministers. Prince Charles, Prince of Wales and Prince William are both knights of the order.  AFP PHOTO / POOL / PAUL HACKETT        (Photo credit should read PAUL HACKETT/AFP/GettyImages)