Fashion

The M&S x Sienna Miller collaboration collection is everything you need for party season

It couldn't have come at a better time.
Image may contain Sienna Miller Clothing Footwear Shoe Adult Person Dress High Heel Fashion Face and Head
M&S

Public service announcement: another M&S X Sienna Miller collaboration collection is here, and if you thought last time was good then you're in for an even bigger treat this time around.

Landing online and in stores today, the 31st October, the line-up has come exactly when we needed it to: i.e. now that all those Christmas invites have started to pour in.

Image may contain: Clothing, Dress, Evening Dress, Formal Wear, Fashion, Robe, and Gown

Sleeveless Satin Ruched Maxi Dress

Image may contain Sienna Miller Clothing Dress Evening Dress Formal Wear Adult Person Footwear Shoe Face and Head
M&S

The first edit, which launched back in June, became a sell-out success in a matter of minutes with everything from those barrel leg jeans (which are being re-stocked in two new washes, FYI) to ruffle-trim boho frocks flying off the shelves. So this time? We're acting faster than ever.

“It was an absolute pleasure to be invited back by the M&S team. I loved working on the debut collection and couldn’t wait to do it all over again,” says Sienna Miller. “Seeing my designs in the real world is so rewarding. I love how each individual wears and styles them and I can’t wait to see their reaction to round two this winter!”

Taking inspiration from her own archive, this instalment brings 35 new and glamorous silhouettes to the table, finished in statement prints and embellishments, with faux furs thrown in the mix – think disco, Studio 54 and the festive season.

“I've always loved that era and I don't think anyone parties quite like they did back then, so I tried to capture that spirit,” Sienna says.

Image may contain: Clothing, Vest, Lifejacket, Accessories, Formal Wear, and Tie

Animal Print Waistcoat

Image may contain: Clothing, Pants, Shorts, Home Decor, and Jeans

Animal Print Wide-Leg Trousers

Image may contain: Home Decor, Rug, Clothing, Skirt, and Furniture

Sequin Mini Skirt

“The lead up to Christmas is an exciting time of year for customers, from festive celebrations to winter weddings, and we know they're looking for stylish outfitting options to really wow their friends and family,” says M&S Womenswear Director Maddy Evans. “Sienna’s personal style resonates so well with the nation and this collection delivers elevated and premium party wear designed by a British style icon known for her red-carpet style.”

It's true: Each piece embraces the high/low dressing both Sienna and Marks & Spencer is known for – whether that's hosting friends at a dinner at home or gracing a star-studded event – all while taking things like the weather into consideration.

“Party season can be hard because it's obviously freezing outside and boiling inside,” says Sienna, adding of her favourite piece: “the sequin dress is fantastic, so I'd probably wear that… I will be wearing that.” At just under £100 it's the perfect winter wedding guest dress that could be styled up with some comfortable heels and a chic blazer, but equally worn just as easily on holiday come spring/summer.

Image may contain: Clothing, Dress, and Lace

Sequin Mini Dress

Image may contain: Clothing, Footwear, Shoe, Sandal, High Heel, Accessories, and Strap

Chain Detail Heels

According to M&S, one of Sienna's favourite pieces is the lace-trim silk maxi dress as it's reminiscent of pre-loved vintage designs she's sourced amongst the stalls of Portobello Market. She also adds: “I love the jeans. I loved the jeans in summer, I love them now, but I think that the beaded two piece co-ord is pretty fabulous. Knowing the craftsmanship that went into making it – it was all hand-beaded – it feels like a very elevated piece.”

Image may contain Sienna Miller Clothing Dress Formal Wear Face Head Person Photography Portrait Blonde and Hair
M&S
Image may contain: Clothing, Dress, Fashion, Formal Wear, Gown, Wedding, and Wedding Gown

Lace Trim Slip Dress

Image may contain: Clothing, Pants, Shorts, and Jeans

Barrel Leg Jeans

Image may contain Sienna Miller Clothing Pants Coat Jacket Blazer Long Sleeve Sleeve Jeans Adult and Person
M&S
Image may contain: Clothing, Knitwear, Sweater, Blouse, Coat, and Jacket

Hand-Beaded Jacket

ONLINE EXCLUSIVE.

Image may contain: Home Decor, Linen, Clothing, and Pants

Hand-Beaded Trousers

ONLINE EXCLUSIVE.

Image may contain Sienna Miller Person Sitting Couch Furniture Adult Blonde Hair Formal Wear Clothing and Dress
M&S

Other key pieces include the chevron sequin mini dress, a nod to her love of David Bowie in his Ziggy Stardust era, and the faux fur jacket featuring buckles inspired by Sienna’s classic noughties pirate boots.

And, if you're not one for all the frills and fancies, season-less wardrobe essentials that Sienna couldn't live without have also been included in the capsule. Find everything from silk blouses inspired by the Chloé runways, to knitwear and women's trouser suits/tailoring (like the three-piece suit she wore to celebrate the launch of the second collection).

Image may contain: Clothing, Knitwear, and Sweater

V-Neck Merino Wool-Rich Oversized Jumper With Cashmere

Not that M&S needed to remind us, especially with clothing and home sales up by 5.3% in the year ending March 2024, but it's collections like this that prove the high-street retailer is on top of its game – and attuned to what's trending, particularly among Gen-Z and millennials.

As a fashion writer, M&S has never felt cooler.

Sienna Miller X M&S can be found online at marksandspencer.com and in 41 stores across London and the UK from today (Thursday 31st October 2024). Save when you shop the collaboration and get free delivery with these Marks & Spencer discount codes at checkout.

Shop everything else we're obsessing over from the M&S X Sienna Miller collection ahead.

Image may contain: Clothing, Pants, Velvet, Skirt, and Jeans

Velvet Trousers

Image may contain: Accessories, Bag, Handbag, Cushion, Home Decor, and Purse

Animal Print Clutch Bag

Image may contain: Blouse, Clothing, Coat, Long Sleeve, Sleeve, Jacket, and Shirt

Animal Print Silk Blouse

Image may contain: Clothing, Vest, Formal Wear, Suit, Blazer, Coat, Jacket, and Shirt

White Waistcoat

Image may contain: Clothing, Pants, Home Decor, Linen, Jeans, and Shirt

White Trousers

Image may contain: Clothing, Dress, Formal Wear, Evening Dress, Fashion, Gown, and Robe

Sleeveless Ruched Maxi Dress

Image may contain: Clothing, Coat, Jacket, and Blazer

Animal Print Blazer

Image may contain: Blouse, Clothing, Long Sleeve, Sleeve, Undershirt, and T-Shirt

Embellished Top

Image may contain: Clothing, Dress, Fashion, Formal Wear, Gown, Evening Dress, Robe, and Coat

Crossover Back Slip Dress

Image may contain: Clothing, Footwear, Shoe, Sandal, High Heel, Accessories, and Strap

Chain Detail Heels

Image may contain: Accessories, Buckle, Belt, and Canvas

Animal Print Belt

Image may contain: Clothing, Dress, Coat, Long Sleeve, Sleeve, and Fashion

Multi Sequin Mini Dress

For more from GLAMOUR UK's Senior Commerce Writer Georgia Trodd, follow her on Instagram @georgiatrodd.