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Cara Delevingne

The model and actress defied tradition at Princess Eugenie’s wedding, arriving at the reception in a tuxedo suit, shirt, tie and top hat, paired with stiletto ‘Blade’ pumps by Casadei. [Photo: Getty]

Robbie Williams, Demi Moore and Cara Delevingne among celebrity guests at Eugenie's royal wedding

It’s official: Princess Eugenie and Jack Brooksbank’s royal wedding was a truly star-studded affair with some surprising Hollywood names making the guest list.

The ceremony kick-started at 11am and the couple’s chosen attendees braved the seriously windy weather (fascinators clasped tightly in their grip) to take to their seats in St George’s Chapel.

Two of Prince Harry‘s former girlfriends, Chelsy Davy and Cressida Bonas, attended the big day while the likes of Robbie Williams, Liv Tyler and Pixie Geldof also made an appearance.

To further demonstrate Princess Eugenie’s firm finger on the fashion pulse, some of the industry’s biggest names took to the pews with models Kate Moss, Naomi Campbell and Cara Delevingne all clad in their finest attire.

Look no further for the ultimate guide to who wore what to Princess Eugenie and Jack Brooksbank’s wedding.

Follow Princess Eugenie’s big day via Yahoo UK’s live blog.

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Read more from Yahoo Style UK:

Princess Eugenie royal wedding LIVE: Follow all the latest updates from Windsor Castle

Who is Princess Eugenie? Everything you need to know 

How you pronounce Eugenie’s name