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Text by the Associated Press

LONDON - Britain's royal family turned out for the annual Order of the Garter service at Windsor Castle.

Queen Elizabeth II was joined by her husband, Prince Philip, the newly-married Duke and Duchess of Cambridge and a host of other royals for the Garter Day ceremony.

Garter Day is a symbolic occasion when holders of the honor, chosen because they have held public office, contributed to national life or served the sovereign personally, meet to celebrate the most senior British order of chivalry.

The former Kate Middleton, also known as the Duchess of Cambridge, grinned broadly as she watched her husband, Prince William, take part in a procession ahead of the service -- causing him to blush.

Take a look at pictures...and all of the headgear. And for more, check out the royals in the rain on Sunday or "trooping the colour" on Saturday .

WATCH for even more royal hats:

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