Royal wedding guests: styles of hats

Guests leave the Westminster Abbey after the wedding ceremony of Britain's Prince William and his wife Catherine, Duchess of Cambridge, in central London April 29, 2011. Prince William married his fiancee, Kate Middleton, in Westminster Abbey on Friday. [Photo/Agencies

Earl Spencer, brother to the late Princess Diana, speaks with guests at Westminster Abbey before the wedding of Britain's Prince William and Kate Middleton, in central London April 29, 2011. [Photo/Agencies]