Sienna Miller, the acclaimed actress, and her boyfriend, Oli Green, are happily anticipating the arrival of their second child together. The couple, who have been in a relationship since February 2022, already share a beautiful daughter, making this new addition to their family all the more special. The exciting news was revealed by Miller herself in December 2025 when she proudly showed off her baby bump at the prestigious 2025 Fashion Awards held in London.
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Miller and Green made their first public appearance together back in 2022 when they were spotted leaving the BAFTA Film Awards. However, it wasn’t until March of the same year, at the Vanity Fair Oscar party, that they officially debuted as a couple on the red carpet. Prior to her relationship with Green, Miller was in a long-term relationship with actor Tom Sturridge, with whom she shares a daughter named Marlowe Sturridge, born in July 2012.
Oli Green, an actor by profession, kickstarted his career after studying at the renowned Strasberg Theatre & Film Institute in New York. His acting credits include appearances in popular TV shows like The Bold and the Beautiful, The Mosquito Coast, A Good Person, and the critically acclaimed series, The Crown. Additionally, Green has made a name for himself in the fashion industry as a successful model, having worked with top brands such as Burberry, Gap, and Frame.
The couple’s public appearances have garnered attention, with their red carpet debut at the Vanity Fair Oscar party marking a significant moment in their relationship. Since then, they have been spotted together at various high-profile events, demonstrating their strong bond and shared interests. From British Vogue’s Fashion and Film Party to the Prince’s Trust Global Gala, Miller and Green have shown a united front, enjoying each other’s company at every turn.
Despite their public personas, Oli Green and Sienna Miller prefer to keep their personal lives out of the spotlight. Green, known for his privacy despite his high-profile relationships, tends to focus on his work and maintains a low-key presence on social media. The couple’s discretion adds an air of mystery to their relationship, allowing them to cherish special moments without constant public scrutiny.
In August 2023, news of Miller’s second pregnancy spread after she was spotted flaunting her baby bump during a beach outing in Ibiza. Subsequently, the couple confirmed that they were expecting another baby, sharing their joy with close friends and family. Following the birth of their newborn, the couple was seen strolling through West London, radiating happiness as they embraced their new roles as parents once again.
Interestingly, there is a notable age gap of 15 years between Oli Green and Sienna Miller, a fact that has raised eyebrows and sparked discussions in the media. In a candid interview with Harper’s Bazaar in June 2024, Miller reflected on her relationship with a younger partner, emphasizing mutual respect and understanding as key pillars of their connection. Despite the age difference, the couple’s love and bond are evident, transcending any societal norms or stereotypes.
As Sienna Miller and Oli Green prepare to welcome their second child, the couple’s journey is a testament to love, respect, and unwavering commitment. Their story serves as an inspiration to many, highlighting the beauty of building a family based on strong foundations of trust and mutual admiration. With a growing family and a shared future ahead, Miller and Green continue to write their own unique and heartwarming love story.