Sienna Miller Teaches Fashion Girls How to Keep White Jeans Alive All Winter

A multi-color fur coat was her not-so-secret weapon.

Sienna Miller was spotted in London wearing unseasonal white jeans and ballet flats
(Image credit: The Image Direct)

Today, I wore white jeans for the first time since August, but only because I'm in Florida. I planned on trading them for dark denim or oversize trousers once I returned home. But a new look from Sienna Miller said I don't have stow them away yet.

Photographer spotted the actor in London's Notting Hill neighborhood, where the New York-born star originally grew up. She looked every bit a London girl in jeans and a statement coat. Miller curated her street style set around a red, white, and blue fur coat, courtesy of Desigual by Christian Lacroix. The $359 jacket's elongated shearling was so voluminous, you couldn't see her shirt underneath.

Dark-wash jeans would've brought out the coat's blue tones, but Miller chose an unseasonal shade instead. Her wide-leg denim appeared as stark white as snow, suggesting they came straight from her summer shelf. Each ankle-length hem revealed Miller's black ballet flats. They appeared to be the loafer-looking Phoebe Philo slippers she wears on repeat.

Sienna Miller was spotted in London wearing unseasonal white jeans and ballet flats

Sienna Miller revived the quintessential summer white jeans in mid-November.

(Image credit: The Image Direct)

Miller's white bottoms may seem bold for November weather—especially given London's 40° forecast this week. (No white after Labor Day is a widely-respected rule across the pond.) However, Miller is right on trend. White pants popped up on numerous Fall 2025 runways, including Chanel, Gabriela Hearst, Elie Saab, Stella McCartney, and Vivienne Westwood.

Most renditions debuted alongside monochrome pieces—see Chanel's matching blouse, neck tie, and cardigan for example. In the Stella McCartney show, a model wore an all-ivory suit set with chunky sneakers. Then, Gabriela Hearst followed suit with a white jacket and wide-leg trousers.

The underlying stratagem between each presentation? Using rich, textured layers to create a wintery effect, even with white jeans. Gabriela Hearst, for one, added a fur-trimmed leather bomber jacket for extra edge.

A model wore white pants on the Chanel Fall 2025 runway

A model wore white pants on the Chanel Fall 2025 runway.

(Image credit: Launchmetrics)

A model wore white pants on the Stella McCartney Fall 2025 runway

A similar style appeared during the Stella McCartney show.

(Image credit: Launchmetrics)

A model wore white pants on the Gabriela Hearst Fall 2025 runway

Even Gabriela Hearst got the white pant memo.

(Image credit: Launchmetrics)

Miller isn't new to white pants in winter either. This time last year, her three-piece white suit was impossible to miss on a night out in London. The shoulder-padded blazer, button-down vest, and straight-leg trousers made it even more daring than her latest look. Peep-toe mules and a tiger-print clutch from her Marks and Spencer collaboration acted as Miller's only non-white selects.

Sienna Miller in London in October 2024

Last year, she took winter whites to a whole new level.

(Image credit: Getty Images)

Every time Miller steps out, she teaches me something new. Today, she showed me white jeans shouldn't have an official expiration date. Thanks to her, my Florida-proof jeans will get some street style time once I return to colder temps.

Shop White Jeans Inspired by Sienna Miller

Meguire Hennes
Staff Writer, Fashion

Meguire Hennes is the fashion staff writer at Marie Claire, where she breaks down the celebrity looks living rent-free in her head (and yours). Whether a star is walking the red carpet or posing on Instagram, Meguire will tell you who they're wearing and why. When she's not gushing about A-listers from J.Law to Rihanna, Meguire also covers breaking industry news.

Previously, Meguire was the fashion news writer at The Zoe Report. She received a bachelor's degree in fashion studies at Montclair State University, and has freelanced at Bustle, Women's Health, Well+Good, and more. You can find her words across the fashion, beauty, health, and wellness verticals, because her Libra moon wouldn't let her settle on one beat. Follow her on Instagram for BTS moments from her Marie Claire era.