Royal wedding guests: styles of hats

Britain's Queen Elizabeth travels to Buckingham Palace in a Semi-State Landau, along the Procession Route, after the wedding of Prince William and Kate Middleton in Westminster Abbey in central London April 29, 2011. Prince William married his fiancee, Kate Middleton, in Westminster Abbey on Friday. [Photo/Agencies]

Britain's Prince Charles and his wife Camilla arrive at Westminster Abbey before the wedding of Britain's Prince William and Kate Middleton, in central London April 29, 2011. [Photo/Agencies]