Princess Eugenie's wedding: Our top celebrity wedding guest outfit ideas!

Cara Delevingne

1/10

Sorry everyone else, Cara Delevinge, who broke the rule book and turned up in an Emporio Armani tux, Chanel heels and a Nick Fouquet top hat, well, tops our list for best-dressed royal wedding guest.

See also: BRIDAL JUMPSUITS: 6 TRENDY WAYS TO STYLE YOURS

Image: @caradelevingne/Instagram

Poppy Delevingne

2/10

While Cara took a masculine approach in a tux, older sister Poppy went for an ultra-feminine and pretty vibe in a powder blue Oscar de la Renta guipure lace midi and coat, then gave it a little drama with a plumed fascinator from Victoria Grant. 

See also: 16 STYLISH GUEST OUTFITS FOR EVERY TYPE OF WEDDING

Image: @victoriagrant/Instagram

Catherine Duchess of Cambridge

3/10

While the Duchess has routinely been seen in coloured coat dresses, she broke away from her usual sartorial choice and arrived at Windsor in this gorgeous berry Alexander McQueen dress with matching Philip Treacy hat. She looks positively glowing! 

Image: @duchessesofkensington/Instagram

Meghan, Duchess of Sussex

4/10

Having just tied the knot herself in May earlier this year, the Duchess of Sussex was elegant in a deep navy blue coat-and-dress ensemble by Givenchy with a matching fascinator. Though this is a pretty pared down look given her usual bolder sartorial choices, it was speculated she was concealing her baby bump (she's due to give birth in Spring 2019!)

Image: @duchessesofkensington/Instagram

Holly Valance

5/10

Australian actress and singer Holly Valance's powder pink Ralph and Russo ensemble is classic and yet remarkably chic. She pairs the look with a classic chignon, bow-accented gloves and a hint of shine. We love! 

Image: @ralphandrusso/Instagram

Naomi Campbell

6/10

You can count on Naomi Campbell to turn on the glamour, especially when the occasion is a royal wedding! While black is oft frowned upon at a wedding, the supermodel kept it carefully wedding-appropriate (and super chic) with a knee-length hemline, white detailing and a flamboyant plumed bolero designed by Ralph & Russo. 

Image: @ralphandrusso/Instagram

Demi Moore

7/10

The wine-hued Stella McCartney dress, which she accessorised with a matching bag, complements Demi Moore's skin tone.

See also: THE BEST WEDDING DRESS SHADES TO MATCH YOUR SKIN TONE

Image: @stellamccartney/Instagram

Marie-Chantal, Crown Princess of Greece & Princess Maria-Olympia

8/10

It's a pink affair for Marie-Chantal, Crown Princess of Greece, and her daughter Princess Maria-Olympia, seen with Crown Prince Pavlos .The Crown Princess opted for a demure dusty pink outfit, while the latter opted for a bolder fuchsia and eye-catching print by Dolce and Gabbana, and a striking silver headpiece by Philip Treacy.

Image: @mariechantal22/Instagram

Robbie Williams and Ayda Field

9/10

It's generally a faux pas to wear white to a wedding, so it may seem Robbie Williams' wife Ayda Field Williams' Giorgio Armani outfit, while beautifully sophisticated, is cutting it a little close... so if you're looking to get style inspo here, you'll want to consider switching up the hue. Unless, of course, your host has included white in the dress code. Her husband, however, cut a pretty dashing figure in a morning suit in varying shades of grey. 

Image: @giorgioarmani/Instagram

Cressida Bonas

10/10

Actress Cressida Bonas, who's a close friend of the bride (although she may more famously be known as Prince Harry's former girlfriend) wore a floral patterned blue velvet Tory Burch dress with a sweet floral headband that oozed feminine elegance. 

Image: @toryburch/Instagram