The Royal Guests and Their Hats Arrive to the Wedding

Adding to the fantastic display at Prince William and Kate Middleton's wedding were the boldly dressed guests -- everyone from royal relatives to Hollywood friends, and "Extra" tips our hat to their adventurous toppers!

Colorful sister Princesses Eugenie and Beatrice showed up wearing unique headwear with their wedding ensembles. Beatrice's monotone taupe Valentino Haute Couture dress had a matching coat and interesting ribbon hat by Philip Treacy that protruded from her forehead.

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Eugenie chose a baby blue Vivienne Westwood suit with a voluminous taffeta skirt and matching blue hat, also designed by Treacy, who created hats for the "Harry Potter" films, and most famously the one Sarah Jessica Parker wore during the premiere of 2008's "Sex and the City."

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Also joining in on Treacy's hat craze was Victoria Beckham, who wore a pillbox that matched her loose-fitting charcoal dress that showed her baby bump.

See who else turned a few heads with their exceptional headgear!