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14 wedding guest hats that turned heads on Prince William and Kate Middleton's big day

Let's walk down memory lane...

royal wedding hats
Fiona Ward
Acting Fashion and Beauty Editor
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1 william kate wedding© Photo: Getty Images

The Duke and Duchess of Cambridge are celebrating their 10th wedding anniversary on April 29 - so we can't help but get a little nostalgic as we remember their royal nuptials back in 2011.

And while Kate's Alexander McQueen bridal gown was the ultimate show-stopper, there were plenty of famous wedding guests that also made headlines with their fashion choices.

SEE: 13 of the most romantic royal wedding kisses through the years

Westminster Abbey was filled with a sea of statement hats for the services, which saw royals from around the world and A-list stars attend. Whether it's a bandeau, a fascinator or a wide-brimmed number - headwear is essential uniform at a royal wedding. So let's look back at some of the most memorable pieces...

2 princess beatrice hat© Photo: Getty Images

Who could forget Princess Beatrice's incredible Philip Treacy creation? We think the royal was ahead of her time with her whimsical, statement choice - which matched perfectly with her chic Valentino outfit.

SEE: Kate Middleton and Prince Middleton's unusual wedding 10th anniversary gifts revealed

3 princess eugenie hat© Photo: Getty Images

Princess Eugenie's headwear was also designed by milliner Philip Treacy, who created many of the hats that adorned the guests on William and Kate's big day.

The royal revealed that the sisters had been hurt by the backlash towards their fashion choices in an interview with British Vogue.

"There was a horrible article that had been written about Beatrice and she got really upset. We were just about to step out and she had a bit of a wobble and cried. I was looking after her," she explained. "And then about an hour later, I had a wobble and started crying and Bea was there for me."

MORE: The Queen pays tribute to Prince William and Kate Middleton on 10-year anniversary

4 victoria beckham© Photo: Getty Images

Victoria Beckham - who was pregnant with daughter Harper at the time - also memorably wore a hat made by Philip Treacy.

5 queen camilla carole© Photo: Getty Images

A lovely moment between the Queen, the Duchess of Cornwall and Carole Middleton at the royal nuptials. Her Majesty opted for a bold yellow hat, while Camilla wore a neutral design.

6 carole middleton© Photo: Getty Images

Mother of the bride Carole perfectly matched her hat to her Catherine Walker outfit.

MORE: 6 times royal ladies stylishly twinned with their mums

7 tara palmer tomkinson© Photo: Getty Images

The late Tara Palmer-Tomkinson wore a bold blue dress, gloves and clutch bag, which she teamed with a matching Philip Treacy creation.

8 sophie winkleman© Photo: Getty Images

Lady Frederick Windsor, also known as Sophie Winkleman, looked beautiful in her statement headpiece and pearl accessories.

9 sophie anne© Photo: Getty Images

Both the Countess of Wessex and Princess Anne opted for pretty floral numbers.

10 joss stone© Photo: Getty Images

Joss Stone memorably opted for a wide-brimmed hat with floral embellishments for the Duke and Duchess' royal wedding day.

11 crown princess victoria© Photo: Getty Images

Crown Princess Victoria of Sweden teamed her tangerine midi dress with a matching hat.

12 zara tindall© Photo: Getty Images

Zara Tindall - then Zara Phillips - also wore a Philip Treacy number, and what a showstopper it was!

MORE: 7 most expensive royal wedding dresses: Meghan Markle, Kate Middleton, Princess Eugenie and more

13 lady amelia eliza kitty© Photo: Getty Images

Earl Spencer's daughters Lady Amelia, Lady Eliza and Lady Kitty all opted for architectural headpieces, too.

14 chelsy davy© Photo: Getty Images

Prince Harry's date for the royal wedding was then-girlfriend Chelsy Davy, who wore a subtle fascinator with net detailing.

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