Members of British society and the royal family have donned their finest hats and fancy outfits for the Royal Ascot horse races.

Queen Elizabeth II and Prince Philip; Prince Charles and his wife, Camilla; and Prince William and Kate Middleton opened the annual week of racing in a traditional carriage procession.

The highlight of Ascot’s year, Royal Ascot week dates back to 1711 when it was founded by Queen Anne.

Here’s a look at some of the fun high hat fashion.

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