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Sienna Miller has delivered her biggest family update yet. The 44-year-old actress just welcomed her third child, her second baby with boyfriend Oli Green, in a joyful announcement that surprised fans earlier today. Miller gushed about the arrival during an exclusive interview.
🔥 Quick Facts
- Mother of three: Sienna Miller confirmed she has given birth to her third child today in an E! News interview
- Second with Oli Green: The couple welcomed their second baby together, after having a daughter in late 2023
- First daughter: Miller shares 13-year-old daughter Marlowe with ex-actor Tom Sturridge, born in 2012
- Age milestone: Miller becomes a mother again at 44, discussing positive experiences of motherhood at this life stage
Sienna Miller Confirms Third Baby Arrival with Exclusive Interview
The British actress revealed her exciting news while discussing her upcoming Jack Ryan movie project. Miller confirmed in an interview with E! News that she has already given birth to her bundle of joy. She did not share the baby’s name or biological sex publicly. The announcement comes after she confirmed her pregnancy at the Fashion Awards in London back in December, where she debuted her baby bump in a stunning Givenchy gown.
This marks a significant moment for the star, who has spoken openly about embracing motherhood in her 40s. Miller previously shared that having children at this age feels much easier than her experience becoming a mother at 29 when Marlowe was born.
Sienna Miller welcomes third baby, second child with boyfriend Oli Green
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Growing Family with Oli Green at the Forefront
Oli Green, a 29-year-old actor, has been dating Miller since late 2021. The couple’s relationship has been nothing short of committed, with the birth of their first daughter in December 2023. That little one is now 2 years old. The pair were spotted together at the Oasis reunion concert in July 2025, showcasing their strong bond. Green’s presence in Miller’s life has been consistently supportive throughout her pregnancy journey, and the two continue to focus on their growing family.
Miller has previously stated she is open to marriage, though the couple has not yet announced an engagement. She told The Independent in 2024 that marriage remains a possibility, focusing instead on enjoying their relationship and expanding their family at their own pace.
Motherhood Timeline and Family Milestones
| Child | Birth Year | Other Parent |
| Marlowe Sturridge | July 2012 | Tom Sturridge |
| Daughter (unnamed) | December 2023 | Oli Green |
| Third child (unnamed) | May 2026 | Oli Green |
“It’s happened!” Miller exclaimed when asked about welcoming her third child, showing her genuine joy and excitement about the new addition to her family.
— Sienna Miller, Interview with E! News
Age 44 and Thriving as a Parent
Miller has become an inspiration for women navigating motherhood later in life. She explained in March 2026 interviews that having children at 44 feels significantly easier than her first experience at 29. The actress has emphasized the mental clarity, financial stability, and emotional maturity that come with age. She discussed how being older provides perspective and patience that younger motherhood didn’t offer. Many fans have applauded her honesty about the challenges and rewards of her journey as a parent at different life stages.
The Abbey Clancy actress appears to have found genuine happiness in her relationship with Green and the expanding family they are building together. Her recent appearance at public events showed her glowing with pride about her growing household, and today’s announcement confirms that joy has translated into welcoming a third child.
What’s Next for Sienna Miller’s Career and Home Life?
While Miller focuses on her new arrival, her career continues to thrive with her involvement in the upcoming Jack Ryan project. The actress has balanced professional commitments with family life admirably. Though she has not yet announced specific career plans beyond the Jack Ryan production, sources suggest Miller remains selective about her film roles. She previously starred in major productions and continues to be a respected figure in the entertainment industry.
Will Miller and Green expand their family further, or is three the magic number? Only time will tell. For now, the couple appears to be basking in the joy of their newest family member. Her decision to keep the baby’s name and gender private shows Miller’s commitment to protecting her children’s privacy while managing her public profile as a successful actress in Hollywood.
Sources
- People Magazine – Comprehensive coverage of Sienna Miller welcoming her third child with Oli Green
- E! News – Exclusive interview featuring Sienna Miller’s announcement of her third baby’s birth
- The Cut – Coverage of Miller’s revelation during her Jack Ryan movie interview
