Sienna Miller just revealed that she is pregnant with her third child, her second with partner Oli Green. The Anatomy of a Scandal actress made a grand revelation on the red carpet of the 2025 Fashion Awards in London, England, at the Royal Albert Hall. View this post on Instagram Instagram PostSienna Miller, who has been keeping a low profile in recent months, made a rare public appearance at the fashion event on Monday, December 1, 2025, wearing a sheer dress from Sarah Burton’s forthcoming Spring 2026 debut collection for Givenchy.The white dress was see-through all over and featured an open-cut front. She styled her blonde hair in loose beach waves and completed her look with dangling chandelier earrings, metallic nails, and a nude makeup look.More details on Sienna Miller’s relationship with Oli GreenSienna Miller and Oli Green were first linked together in February 2022 after they were spotted on a date in New York.She spoke to British Vogue about their relationship in 2023:“I was like, ‘This is absurd. This will not go anywhere.’ He worked hard to persuade me to go out for a drink with him.” View this post on Instagram Instagram PostIn March of that same year, the couple made their relationship red-carpet official at the Vanity Fair Oscar Party in Beverly Hills. In April, Sienna Miller revealed that she had frozen her eggs when she clocked 40 because of the fertility pressure.She told Elle UK:“Biology is incredibly cruel on women in that decade — that’s the headline, or it certainly was for me. Then I got to 40 and I froze some eggs. Having been really focused on the need to have another baby, I’m just like, if it happens, it happens. That kind of existential threat has dissipated.”In 2023, the actress got pregnant with her second child, her first with Oli Green. She gave birth to a baby girl in January 2024. Sienna Miller is a mother of two girls — a daughter, Marlowe, 13, with her ex Tom Sturridge, and her second child with Oli.Sienna spoke with British Vogue during their 2023 cover issue about her romance with Oli Green, with whom she shares a 14-year age gap.“I don’t think you can legislate on matters of the heart. I certainly have never been able to.”She also discussed having a baby later in life:“I'd love to get to a point where I didn't feel the need to make a joke of my being older and having a baby. To show I'm in on the joke.”Also read: "Just need Jay Crawford now" - Fans react to Skip Bayless' photo with Stephen A. Smith going viral after having dinner together in Beverly Hills