Couture

I Think This Is Sienna's Best Outfit of the Year, and It's All Down to This Chic Jacket Trend

According to Sienna Miller and Fashion Editors, cinched-waist leather jackets will be autumn's favourite buy—these are the best ones out there.

Герои27 сентября 2026 г.

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Sienna Miller steps outside in New York wearing a black leather cinched jacket with black bootcut trousers and peep-toe shoes.
(Image credit: Getty Images)Getty Images
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If my time in the fashion industry has taught me anything, it’s that when Sienna Miller backs something, it won't be long until it becomes a cult-worthy buy. So this week, as the actor stepped out for one of her many press appearances for her film War, she put me onto a jacket trend I’m now convinced will be everywhere soon.

Stepping away from her usual boho sensibilities, Sienna opted for a sleek, modern look, championing a leather jacket silhouette I think is about to take off. Her cinched-waist style featured strong shoulder pads, a glossy leather finish and a broad collar that borrowed from the traditional biker jacket silhouette.

Styling Balmain's Signature Leather Jacket (£3590) with the French label's Low-Waisted Wool Satin Trousers (£1090), Sienna's all-black look created a sleek, wearable foundation that let the details of each piece shine. The jacket's cinched waist, for example, created a contoured silhouette, bringing shape and elegance to her otherwise unfussy outfit.

Sienna Miller steps outside in New York wearing a black leather cinched jacket with black bootcut trousers and peep-toe shoes.
(Image credit: Getty Images)Getty Images

Whilst a black leather jacket will never go out of style, each season tends to bring a fresh take on the classic silhouette. For autumn/winter 2026, oversized proportions, cinched waists and strong shoulders are the details to know.

Having already found a comfortable spot in Sienna's rotation, I also began spotting the silhouette on a handful of well-dressed editors during London Fashion Week this past weekend. What's more, key high-street retailers have already started stocking the style, H&M included.

So, if you're in the market for a new autumn layer, I hope I've made a case for this one. Read on to shop the cinched-waist leather jackets I'm recommending below.

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