Sienna Miller is pregnant! Know all about her boyfriend, Oli Green, their children, career and more

Sienna Miller walked the red carpet with an adorable bump, and the internet has started talking about it. The 43-year-old donned a white crystalline dress with ruffled pink heels and dangling earrings, smiling wide for long lenses. Welcoming her child, she strutted on the carpet for the 2025 Fashion Awards at the Royal Albert Hall in London, England, on December 1, 2025. Embracing motherhood, Milier is expecting her second child with her boyfriend, Oli Green. They welcomed a daughter in 2023, and she has a 13-year-old daughter, whom she shares with her ex, Tom Sturridge. The ‘American Sniper’ actress previously also opened up about the pressure to continue the family in her 40s. The pressure... about kids, and should I have more, and why haven't I, and all of that, which is a really loud noise,” she said to Elle UK in 2022, before adding, “Biology is incredibly cruel on women in that decade—that's the headline, or it certainly was for me.” The actress shared that she decided to freeze her eggs, helping to calm her anxiety. “That kind of existential threat has dissipated,” she continued. Sienna Miller and Oli Green have been dating since 2022, welcoming a child a year later. The 28-year-old actor is known for his prominence in the world of fashion, films, and television. After studying at the Strasberg Theatre & Film Institute in New York, Green dipped his toes in acting and is renowned for his role in ‘The Crown.’ While he campaigned for luxurious clothing brands, Green has also appeared in music videos and short films, according to the Economic Times. On December 1, 2025, the couple posed together in all smiles, wrapping their arms around each other. He wore a sleek black suit with light grey stripes, with a white shirt.