Sienna Miller's new M&S collection has launched and it's 'utterly dreamy'

Sienna Miller's first collaboration with Marks & Spencer was a resounding success and the actress is back for another edit. Her new partywear edit has landed in time the festive period and on Tuesday (October 29), she was spotted in a crisp three-piece suit from the collection.

The outfit, comprising white wide-legged tailored trousers, a matching button-up waistcoat, and a fitted Wool-Blend Double-Breasted Blazer, cost less than £300 altogether and would be an excellent investment for the upcoming party season.

The 42-year-old style icon accessorised the look with an animal-print clutch bag (£79) and black peep-toe satin heels (£69), both available to purchase today.

Drawing inspiration from Sienna’s personal archive of timeless style, this stunning 35-piece party edit pays homage to decadent glamour, featuring statement prints, embellishments, and faux furs inspired by some of Sienna’s favourite vintage finds.

The designs embody the classic ‘high/low dressing’ concept, which is central to the collection and reflects Sienna’s authentic style – whether she's hosting friends at home or walking the red carpet.

Featuring fluid silhouettes, rich textures, and vintage-inspired fabrications, each piece from Sienna's collection draws inspiration from her personal style journey, with nods to iconic looks from her personal archive.

At an intimate media event in London on Tuesday night, Sienna shared her thoughts on the new collection: "This second collection is very much a party edit for the festive season. It’s got tailoring, faux fur, party dresses, statement prints, embellishment, co-ordinating accessories and also my favourite jeans from the first collection, in two new washes.

"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!"

The edit also includes some leopard-print pieces such as the Pure Silk Animal-Print Tie-Neck Blouse (£99) and the Animal-Print Leather Belt (£25). The tie-neck blouse is crafted from sheer silk and mother of pearl buttons, featuring Sienna's signature velvet ties at the cuffs and a necktie which can be left undone for a laidback look.

Fan responded on social media, one commented: "Utterly dreamy collection." A second added: "Bright option for fall! Absolutely loving this white suit set."

One eagle-eyed fan spotted: "Some sizes are already out of stock just an hour after the release." But some were disappointed when they noticed the sizes only go up to UK18.

The Sequin Mini Dress, £99, and this multi-coloured Bow Detail Sequin Mini Dress, £149, are great choices for festive dressing. These are also a fun nod to Sienna’s love of David Bowie in his Ziggy Stardust era.

Sienna isn't the only star who has recently launched a fashion collection, BGT judge Amanda Holden also partnered with Lipsy for a range of winter warmers including a stunning, shape-sculpting mesh dress, £72.

For everyday cosy wear, Alex Jone has launched a clothing range with Cotton Traders which is full of snuggly and warm pieces - with prices starting from affordable £29.