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    1. Fashion

    Sienna Miller's Easy Autumn Outfit Highlights How to Wear the Colour of the Season

    White jeans, a navy knit and a statement red jacket: this outfit couldn't be easier to recreate

    Lauren Cunningham's avatar
    By Lauren Cunningham
    Published 29 September 2026 In Features

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    Sienna Miller wears white jeans red jacket
    (Image credit: GOFF PHOTOS/Gucci)
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    Yes, Sienna Miller has long been a style muse. Her boho looks are always a favourite, as was her sell-out collection with M&S—but last week's style combination proves even her easy everyday outfits are worth a moment of our attention. It seems Sienna has solved our dilemma of what to wear in this unusually warm autumn: white jeans, a classic navy knit and a statement red jacket.

    While there's nothing necessarily wow-making about this particular outfit, it's one that's actually wearable while touching on a number of current trends: primary colour clashing, the bandana necktie and the bold pop of red. The shade being a key one to note this season, with Prada, Schiaparelli, Alaïa, McQueen making it a focal point of their Autumn/Winter 26 runways. And in true Sienna style, it's genuinely practical, not overly polished just for the cameras.

    To see us through the cold mornings and warm afternoons, the actress has also opted for an underrated shoe: a simple black leather slip-on that really can work for any occasion, even the office. Just scroll below to see how we're creating this everyday outfit.

    Shop Sienna Miller's Easy Autumn Outfit

    Technical Bomber Jacket With Side Button

    Massimo Dutti
    Technical Bomber Jacket With Side Button
    £130
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    This bold red bomber jacket feels like a natural next step from last seasons shell jacket trend. Plus, it pairs seamlessly with white, black and denim blue shades.

    Merino Cashmere Relaxed Jumper | Navy

    Jigsaw
    Merino Cashmere Relaxed Jumper
    £159
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    This wool-cashmere blend jumper is cosy yet classic, meaning it can easily pair with any outfit.

    Levis Ribcage Straight Ankle Grazer Jeans in Ecru

    Levis
    Ribcage Straight Ankle Grazer Jeans in Ecru
    £100£75
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    What keeps Sienna's look feeling laidback is the straight-leg and raw hem of the white jeans, just like this Levi's pair.

    Ophidia Large Tote Bag

    Gucci
    Ophidia Large Tote Bag
    £1440
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    This vintage-feeling Gucci canvas tote is large enough to hold all the essentials—even a laptop for work.

    John Lewis, Wool Bandana Scarf, Blue

    John Lewis
    Wool Bandana Scarf
    £22
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    For an extra layer of detail, tie this bandana around the neck of any jumper, cardigan or coat like Sienna.

    Hush Asymmetric Leather Ballet Flats

    Hush
    Asymmetric Leather Ballet Flats
    £110
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    Not quite a ballet flat yet certainly not a brogue, these slip on black leather shoes really are a where anywhere kind of style.

    Marie Claire Newsletter

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    Lauren Cunningham
    Lauren Cunningham
    Contributor

    Lauren Cunningham is a freelance fashion and beauty editor covering runway reviews, fashion news, shopping galleries and deep-dive features. 

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