Following the immense success of Sienna Miller's boho-inspired M&S collaboration collection that was released earlier this year (and sold out within minutes), the actor has joined forces with the high-street giant once again. Much to fans' delight, this time around, it's all about partywear – just in time for the festive season.

The collection features everything from sequin minis and silky slip dresses to velvet tailoring and those barrel-leg jeans in two new colourways, all of which drop online and in stores today. The look we're most excited to shop, however, is the one that Sienna Miller wore while out on the town in London earlier this week...

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On Tuesday night, Miller hosted an intimate media event in Covent Garden to launch her hotly anticipated second exclusive design collab with M&S, and wore an extremely chic bridal white three-piece suit for the occasion – plucked straight from her collection, of course.

sienna miller white suit marks spencer collab
Ricky Vigil M / Justin E Palmer//Getty Images

SHOP SIENNA MILLER X M&S NOW

Miller's ensemble consisted of white wide-leg trousers, a waistcoat and a double-breasted blazer – the perfect look for a modern winter bride, in our opinion, particularly given the seriously accessible price-point. The actor accessorised with black strappy sandals and a leopard-print clutch bag, both also from her just-dropped M&S collection. You can shop her exact look below.

Shop Sienna Miller's White M&S Suit
Wool-Blend Double-Breasted Blazer
Sienna Miller X M&S Wool-Blend Double-Breasted Blazer
Wool-Blend Waistcoat
Sienna Miller X M&S Wool-Blend Waistcoat
Wool-Blend Trousers
Sienna Miller X M&S Wool-Blend Trousers
Chain-Detail Satin Sandals
Sienna Miller X M&S Chain-Detail Satin Sandals
Animal-Print Leather Clutch Bag
Sienna Miller X M&S Animal-Print Leather Clutch Bag
Buckle Detail Faux-Fur Jacket
Sienna Miller X M&S Buckle Detail Faux-Fur Jacket

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Clementina Jackson
Site Fashion Editor

Clementina Jackson is Acting Site Fashion Editor at ELLE UK, working across news and features, trends, e-commerce and SEO. She was previously Fashion Editor at Cosmopolitan and Women’s Health, and Acting Digital Fashion Editor at ELLE UK, where she was named as a PPA 30 Under 30 award winner for her work on size inclusivity. An experienced fashion, travel and luxury lifestyle journalist, Clementina has also written for Harper’s Bazaar, Vanity Fair, Condé Nast Traveller, Tatler, Red and Italy Segreta.