Sienna Miller, 43, and Oli Green, 28, Expect Second Baby Amid Age Gap Romance
Sienna Miller and Oli Green announce second pregnancy

Actress Sienna Miller and actor Oli Green have announced they are expecting their second child together, making the happy revelation on the red carpet at the 2025 Fashion Awards.

A Glitzy Announcement at the Fashion Awards

The couple, who welcomed their first daughter in January 2024, arrived at London's Royal Albert Hall with Miller proudly cradling her baby bump. The 43-year-old star of 'Layer Cake' wore a sheer Givenchy gown for the occasion, while her 28-year-old partner stayed close by her side. The event, also attended by celebrities like Maya Jama and Cate Blanchett, saw Ellie Goulding share her own pregnancy news the same evening.

From Halloween Party to Growing Family

Miller and Green first met at a Halloween party in 2021. In an interview with British Vogue in December 2023, Miller admitted she was initially reluctant to pursue the relationship due to their significant age difference. "I was like, 'This is absurd. This will not go anywhere,'" she recalled. "He worked hard to persuade me to go out for a drink with him."

Prior to her relationship with Green, Miller was in a four-year relationship with actor Tom Sturridge until 2015 and had an on-off relationship with Jude Law between 2004 and 2011. She also shares a 13-year-old daughter, Marlowe, with actor Tom Sturridge.

Navigating a 15-Year Age Difference

The couple's 15-year age gap has been a topic of public discussion, which Miller has addressed candidly. Speaking to Harper's Bazaar, she expressed initial annoyance at falling for a younger man, saying, "I wasn't like, 'I'm gonna get a younger boyfriend.' It was more, 'F**k! Why are you young? That's so annoying.'"

However, she has since found the dynamic works in her favour, praising Green's generation for their respect towards women. "There is a difference in the way that generation of men respect women," she noted. "It's specific to him, he is very wise and well-adjusted, but I do believe it's also that generation."

Oli Green is an actor and model known for his role in Zach Braff's 'A Good Person' and for playing Rupert Finch in two episodes of Netflix's 'The Crown'. He has also modelled for Burberry and, with Miller, became the first couple featured in a Frame denim campaign.

Reflecting on her growing family after the birth of their first child, Miller told Harper's Bazaar, "I'm in heaven. It's been a cathartic, healing experience... I'm much more balanced and settled and wise." The couple have not yet publicly disclosed the name of their first daughter.