Oli Green is an actor who has been dating Sienna Miller. He is overjoyed as an expectant father. The upcoming baby will be his second child with Miller.
Miller dropped a bombshell with her pregnancy in December 2025 when she attended The Fashion Awards 2025 at Royal Albert Hall in London, England. She surprised us with her baby bump while walking the red carpet. The BAFTA-nominated actress looked gorgeous in her white dress.
The news of their first child, a daughter, was revealed by People.com back in January 2024. When it comes to their kids, she and Green both prefer to stay away from the limelight.
For Miller, this will be her third child. She shares a daughter named Marlowe Ottoline Layng Sturridge with English actor Tom Sturridge.
Prior to Green, she was romantically linked to Archie Keswick. She was even engaged to Lucas Zwirner, with whom she split in September 2020.
While her previous relationships might not have worked out as expected, she is enjoying a whirlwind of romance with her beau, Oli Green. Here’s more about Sienna Miller boyfriend and their relationship.
The Couple Has 15-Year Age Gap
Oli Green and Sienna Miller first met at a Halloween party. Opening up about her relationship with Harper’s Bazaar in June 2024, the 44-year-old actress commented about her 15-year age gap with Green:
“I didn’t expect to take it seriously and then quite quickly, I fell in love. I wasn’t like, ‘I’m gonna get a younger boyfriend,” she said.
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The couple was first linked together back in February 2022. They attended a basketball game at Madison Square Garden in New York. They were seen arm-in-arm watching the match between the New York Knicks and the Memphis Grizzlies.
Less than two months after their dating news surfaced online, the duo attended a major Hollywood event. Green made a red carpet debut at the Vanity Fair Oscar Party in Beverly Hills with Miller in April 2022.
They Do Not Shy Away From Showcasing Romance
Green and Miller often enjoy dates, and their romance is quite adorable. They were seen attending the Men’s Singles Final at the French Open in Paris back on June 4, 2022. The lovely couple watched the finale between Rafael Nadal and Casper Ruud.
At one point, they put on a loved-up display as the duo shared a kiss while enjoying the tennis match. They were snapped sitting next to actor Hugh Grant. As the duo watched the game, they were seen cheering and clapping.
On their date, Miller donned black jeans and a white V-neck, and Green wore a blue shirt and matching jeans. They were full-on PDA and cozy display, excitingly enjoying day 15 of the French Open.
Who Is Oli Green?
Oli Green is a model and has a thriving career in acting. Interested in acting from a young age, he enrolled at Lee Strasberg Theatre & Film Institute in New York and completed his graduation.
According to IMDb, he appeared in the soap opera The Bold and the Beautiful, portraying the role of Collin Flirt in 2020. His other TV credit includes A Good Person (2023), The Gray House (2024), and Bridget Jones: Mad About the Boy (2025).
As a model, Green has been endorsed by brands like Burberry and has appeared in the advertisement campaigns for a high street retailer, Gap.
He was born in 1997 to his parents, Jonathan Green and Alison Ross Green. His father, Jonathan, is the CEO of a gallery based in Mayfair. Meanwhile, his mother, Alison Ross, works at Frieze Masters as a VIP Advisor.
