Sienna Miller Reveals Her Pregnancy in a Totally Sheer Dress |Best Knockoff Luxury Clothing

Sienna Miller wears a sheer white dress to announce her third pregnancy on the red carpet at the British Fashion Awards in London

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All eyes were on Sienna Miller as she stepped onto the red carpet at The Fashion Awards 2025 in London tonight. Draped in a sheer white Givenchy by Sarah Burton gown—specifically, look 37 from the spring/summer 2026 collection—Miller made a bold announcement: She’s expecting her third child. The empire-waisted, floor-length mesh dress revealed her baby bump beneath. She finished her red carpet maternity look with pearl pendant earrings and furry pink sandals, both also by Givenchy.

The Fashion Awards, historically known as the British Fashion Awards before its 2016 rebrand, has spotlighted decades of fashion’s most influential designers and innovators since its inception in 1989. This year’s ceremony, held at London’s Royal Albert Hall, featured a strong contingent of nominees, ranging from established names to rising talents. The 2025 British Womenswear Designer of the Year winner was Sarah Burton for Givenchy. Simone Rocha, Chopova Lowena, Charlotte Knowles for Knwls, and Erdem Moralıoğlu were also nominated. Scroll down to see Sienna Miller's red carpet pregnancy reveal.

Sienna Miller and her boyfriend Oli Green pose on the red carpet at The Fashion Awards in London as she announces her pregnancy with a sheer white dress

Sienna Miller wore a sheer white empire-waist dress that revealed her baby bump at the British Fashion Awards in London

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Erin got her start as aBest Knockoff Luxury Clothing intern in 2011—back when the site only published a single story per day. (We have since increased that number twentyfold.) She graduated magna cum laude from USC and lives in Los Angeles. In college, she also interned at Refinery29, where she was promoted to editorial assistant and then assistant editor. After nearly three years at R29, she came back to WWW in 2015, where she is now the Associate Director of Fashion News. From the Oscars to the Met Gala, she leads the site's entire red carpet coverage strategy. She specializes in celebrity and fashion news but also enjoys writing travel features and runway reports. She frequently contributes to WWW's social accounts and has a sizable following on her personal TikTok.