Sienna Miller Just Wore the Colour That Will Dominate 2025 with Winter’s Most Elegant Boot Trend

Having spent so many years at the epicentre of the British style scene, Sienna Miller is always an excellent temperature check for the trends set to ripple across London each season.

Though she always upholds her impeccable sense of style, Miller isn't afraid to approach a new-season trend. But instead of letting fresh-from-the-runway items dominate her outfits, the style icon blends new trends into her wardrobe almost inconspicuously—never letting them dominate her looks.

As such a strong force on the London street style scene, I'm always primed to pay attention when we're treated to a new outfit from Miller, and her most recent is one of the strongest I've seen in a while. Proving that her mind is already on spring/summer 2025, she stepped out in a neutral ensemble save for a few notable pops of colour. With her sleek Prada bag in a light-blue shade, Miller nodded to the fresh colour trend that will be taking over next year.

With an icy tone, the pale hue adds an understated twist that brings brightness to every ensemble. Cropping up across multiple S/S 25 runway collections including Paul Costelloe and Jil Sander, the shade is gearing up to dominate the next few months. Whilst Miller's baby-blue bag worked well with her sandy 'fit, it was her burgundy boot pairing that really made it sing.

Sienna Millers wears a baby blue bag and burgundy boots.

(Image credit: Getty Images)

Dominating shop fronts right now, the burgundy shoe trend is one of the season's heroes. Allowing us to move away from black whilst retaining a rich and moody colour payoff, burgundy footwear adds a warm wash of colour and an elegant point of interest to an outfit in a low-key but impactful way.

If, like me, you're eager to shop Miller's trending accessories, read on to discover our edit of the best baby-blue bags and burgundy boots.

SHOP OUR FAVOURITE BABY-BLUE BAGS AND BURGUNDY BOOTS:

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Natalie Munro
News Writer

Natalie Munro is Who What Wear UK’s news writer. Having worked in the fashion industry since her time at university—where she obtained a BA in Journalism from University of the Arts London, Natalie's experience spans journalistic and styling roles. In the early stages of her career Natalie predominately worked on editorial shoots for fashion publications such as British Vogue, Vogue Ukraine, AnOther Magazine and Elle UK, before moving into journalism roles.

On completion of her degree she interned in the editorial team at British Vogue and later went on to freelance for the publication. Here, she developed her interest in reporting on the latest fashion news and trends. Inspired by the dynamic nature of the industry, Natalie went on to write for other lifestyle and fashion brands and publications before taking on the role as News Writer for Who What Wear.

With an interest in uncovering the latest fashion trends, Natalie takes a leading role in identifying news for Who What Wear UK. Focusing on trends on and off the runway, as well as street style and celebrity fashion, Natalie reports on a daily basis, ensuring that she remains ahead of the trends. Natalie also creates content for Who What Wear’s social channels including TikTok and Instagram on a weekly basis.