Sienna Miller’s M&S collection has finally dropped – and you’re going to want everything

Boho is back 👏

by Cigdem Tanrioglu |
Published on

You may have heard some whispers, but now we can finally confirm that the rumours are true. Actress, model and style icon Sienna Miller has collaborated with high street heroes M&Sto bring us our ultimate capsule wardrobe – and trust us when we say you’re going to want to wear every single piece ASAP.

Sienna first teamed up with M&S back in September last year as she was the face of the brand, which went down a storm with items selling out almost instantly—however, this time round she has taken over in the design studio.

That’s right, the 42-year-old can officially add ‘fashion designer’ to her CV.


If you’re wondering how this dream team came into action, then you’re in luck as Sienna filled us in ‘I have always had a genuine love for M&S - it's a brand that is part of the fabric of British life and holds special associations for so many people. To collaborate on a womenswear design project made total sense.’ We couldn’t agree more to be honest.

Each item in the range is inspired by the mum-of-two’s own personal wardrobe and features 33 stunning summer essentials you’ll want to wear now and for years to come. We’re talking 70s-inspired prints, vintage style dresses and easy-to-wear separates which will have you covered from summer festivals to the school run and even the red carpet (AKA walkway to our fave bar).


Fancy getting in on the action? Sienna Miller’s new range for M&S launches today and is available online and in selected stores, but with prices starting from just, £19.50, the range is predicted to sell out fast. That’s why we’ve saved you scrolling time by picking out the key buys below – you can thank us later.

SHOP: Sienna Miller for Marks & Spencer’s

M&S X Sienna Miller Ombre DressM&S
Price: £65

If you’re after a versatile dress that will work for just about any occasion, look no further than this gorgeous midi dress. Featuring a sunset-style ombre effect, this fully lined frock will have you covered from lunch with the girls to a stroll to the beach bar during your holidays. We love the slash-neck detailing and strappy, low-cut back which work together to elevate the simple yet stylish frock.


  • 100% viscose shell to keep you feeling cool
  • Fully lined
  • Adjustable self-tie back closure


  • Backless style cannot be worn with a bra
  • Only available in regular length

M&S X Sienna Miller Printed ShitM&S
Price: £39.50

We love a co-ord over here at Closer HQ, and this 70s-style stunner is going straight into our shopping cart. Crafted in 100% viscose (which is perfect for keeping cool in the heat FYI), this long-sleeve shirt is ideal for styling with matching trousers, a pair of jeans or even a denim midi skirt. Plus you could easily re-style it as a beach cover-up come holiday season.


  • Made with 100% viscose
  • Button up detailing
  • On-trend print


  • Buttons may gape on larger busts

M&S X Sienna Miller TrousersM&S
Price: £39.50

Get ready to make a statement in these power print pants. Inspired by Sienna’s vintage clothing collection, the wide leg trousers feature a seriously stylish Seventies-style print, which give us total boho-babe vibes.
They’re designed with a mid-rise fit, which is ideal for anyone who wants to step away from those Simon Cowell style high waisted trousers, but isn’t brave enough for a pair of hipsters (we’re still scarred from the first time). We’ll be styling ours with the matching shirt and tan sandals for an effortless off-duty look, and then switching it up to heels and a silky camisole for a summer night out.


  • Made with 100% Viscose
  • Flattering mid-rise fit
  • On-trend print
  • Versatile fit


  • Only available in one, standard length

M&S X Sienna Miller Metallic Beaded Macramé BagM&S
Price: £49;.50

In case you haven’t realised – beaded bags are kind of having a moment right now, which is why this beauty has gone straight to the top of our wish list. Not only is it handcrafted with gorgeous metallic beads, but it also features super soft leather-wrapped straps that give designer vibes without the price tag. When we saw the bag IRL we were most impressed with the fact that it is actually lined, so you can pop your bits in there without worrying about bits falling out.


  • Handcrafted with on-trend beading
  • Fully lined
  • Leather straps easily fit over shoulders
  • Designer look for under £50


  • Drawstring fastening may not be suitable for everyone
  • Doesn’t feature inner pockets

M&S X Sienna Miller Pure Cotton Printed Quilted JacketM&S
Price: £65

If there is one standout piece from Sienna Miller’s collection for M&S it has got to be this quilted jacket.
The retro micro-block print features a contrasting floral trim, which we’re a little obsessed with right now. Plus it is made with the softest cotton you’ll ever feel – so you’ll never want to take it off, which is ideal seeing as it is still jacket weather outside.


  • Made with 100% cotton
  • Fully lined
  • Can be worn again during Autumn


  • Can’t easily be washed

M&S X Sienna Miller Pure Cotton Striped ShirtM&S
Price: £35

There are a few items we cannot live without: our phones, a great mascara and an impeccable cotton shirt. So trust us when we say Sienna’s take on the wardrobe classic is going to become your everyday go-to. Made with 100% for that seriously crisp finish, this striped shirt is perfect for styling with jeans, skirts or even over dresses. The best bit about this stunning shirt? It has got to be the smocked detailing on the shoulder which instantly elevates this basic buy. We’re sold.


  • Made with 100% cotton
  • Easy-to-use button fastening
  • Also available in pink
  • Long sleeves can be rolled up


  • Relaxed fit may not be to everyone’s taste

M&S X Sienna Miller Barrel Leg JeanM&S
Price: £49.50

No wardrobe is complete with a great pair of jeans, which is why Sienna Miller has given us the gift of dreamy denim inspired by her personal faves. This barrel cut style feature a nifty side seam which not only works wonders for the fit, giving just the right amount of ‘slouch’, but also makes the jeans look way more expensive than they are. Be warned: these seriously cool jeans are slouchy, so if you want a tighter fit then dry sizing down.


  • On-trend shape
  • Available in petite, regular and tall fits


  • Relaxed fit may not suit everyone’s needs

Fancy getting a bit more celeb-approved clothing in your wardrobe? We've also been loving Michelle Keegan's range for for those summer vibes, while Billie Faier's collection for George at ASDAhas got all of our wardrobe basics covered. Or for something a little more luxe, we're turning to Victoria Beckham's recent collab with Mango - who knew your wardrobe could be such a star-studded place?

What sizes are stocked at Marks & Spencer?

While the available sizes vary between the brands stocked on the site, the core M&S Collection range is available in sizes 6 to 22.

In addition, many styles are available in either short or long, which is great news for anyone looking for a petite or tall fit.

Are Marks & Spencer clothes true to size?

Guessing your size when ordering online can be a little tricky. However, for the most part, Marks & Spencer dresses fit true to size.

If you’re still not convinced, check out the ‘size review’ section on the product page. This will allow you to see if that new frock is marked as ‘runs small’ or ‘runs big’.

Cigdem Tanrioglu is Closer's Deputy Style Editor. As Closer’s resistant mid-size expert, she’s usually found scouring the high street for the best feel-good buys, or on a beach obsessing over her horoscope.

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