On Her Birthday, A Look at How Sienna Miller Mastered Modern Boho Style

Sienna Miller has long been a master of boho style. Her love of a romantic, free-spirited fashion aesthetic traces all the way back to the 2000s, when she was known to traipse around music festivals like Coachella and Glastonbury wearing studded Chloé boots and vintage vests. Even two decades later, Miller is still proving a devotee to bohemian staples like ruffles, lace, and maxi dresses—and her love of the whimsical couldn’t come at a better time. With labels like Chloé and Valentino leaning into the frilly sensibility this year, Miller made 2024 her year to shine: Nobody did boho dressing better than her over the past 12 months.

It all began when Miller attended the fall 2024 Chloé debut of designer Chemena Kamali, who is largely to thank for re-igniting the boho trend this year. Presented in February, Miller hit the front row in the label’s black leather bomber jacket and white silk-lace skirt. “It was the most beautiful show I’ve seen in a long time,” Miller told Vogue at the time. “It was like my dream wardrobe walking past me.” It’s no wonder: The lace maxi dresses and billowy fabrics seemed to be plucked right out of her 2000s closet. Once fashion fell in love with look again, it didn’t take long for Miller to reclaim the early aughts trend. Almost every red carpet she has hit since—whether at the Met Gala, or while promoting Horizon—she has continued the look, doubling down on Chloé’s elegant, soft, and feminine designs.

Take her appearance at the 2024 Met Gala, when she graced the Met steps in a white lace maxi dress from the label—a heavenly construction. Or when she attended the closing ceremony of the Venice Film Festival wearing a sheer white lace dress, punctuated with leather thigh-high boots and an oversized Chloé belt. On anyone else, the look—directly plucked from the runway—could read literal or even lazy, yet on Miller, it seemed totally appropriate. A look she would wear, say on, a regular Tuesday.

Miller’s love of bohemian style has also extended to everyday separates, too. For the spring 2025 Chloé show, she leaned into pastels with a blue draped jacket and pink high-waisted trousers. While out in London in October, she also stepped out in a breezy cream suit—a more effortless take on 9-to-5 dressing. Whether dressed up or down, Miller has perfectly captured the essence of boho dressing—which is to never look like you are trying too hard. That skill is precisely why she will always be the queen of boho style, and we predict it’s here to stay come 2025.

Below, explore some of Miller’s best boho style moments this year.