Of course, the pomp and circumstance of their engagement was nothing compared to the royal wedding itself. On April 29, 2011, thousands of guests gathered inside London's Westminster Abbey to watch the couple say their "I dos." Even more well-wishers lined the streets of London to watch the newlyweds kiss on the balcony of Buckingham Palace, which served as the site of Will and Kate's lunch and evening receptions, thrown by the Queen and Prince Charles, respectively.