Full Breakdown
Sienna Miller Welcomes Third Child as She Prepares for ‘Jack Ryan: Ghost War’
5/16/2026, 12:15:50 AM
Third Child Arrival and Upcoming Film Role
Sienna Miller announced the birth of her third child, a baby girl, in early March 2026. The newborn is her second child with boyfriend Oli Green, a 29-year-old actor and model. Miller told E! News that she had a tiny baby and was on very little sleep but madly in love with the child. In the same period, Miller confirmed she will portray MI6 officer Emma Marlowe in the Amazon Prime Video film *Tom Clancy’s Jack Ryan: Ghost War*, slated for worldwide release on 20 May 2026.
Relationship and Family Background
Miller, 44, began dating Green in February 2022 after her 2012 divorce from actor Tom Sturridge, with whom she shares daughter Marlowe, now 13. Miller has publicly defended the 15-year age gap, stating that “mature women and younger men can have deeply fulfilling partnerships.” Green, born in Los Angeles in 1997, comes from an art-focused family; his mother works at Frieze Masters and his father is the son of an art dealer.
Timeline of Key Milestones
- Feb 2022 – Miller and Green start dating.
- Jan 2024 – Their first child together, a daughter, is born.
- Mar 2026 – Birth of Miller’s third child (second with Green).
- May 20 2026 – *Jack Ryan: Ghost War* releases globally.
Data & Statistics
- Miller: 44 years; Green: 29 years.
- Children: three (Marlowe 13, second child ? 2, newborn).
Official Statements & Responses
Miller described traveling with a newborn and toddler on *The Tonight Show* as an “absolute disaster,” noting she broke down in immigration after a transatlantic flight. John Krasinski, in a Screen Rant interview, said, “I would love to continue Jack Ryan as a film series.” Director Andrew Bernstein stressed that any sequel must be justified by a strong story.
Criticism & Public Discussion
Some observers have questioned the 15-year age difference, but Miller has repeatedly emphasized that partnership quality outweighs societal expectations.
Verbatim Quotes
- “It’s happened. I have a tiny baby next door,” — Sienna Miller, actress, to E! News
- “It feels like stringing sentences together is a bit challenging. I’m on very little sleep, but I’m madly in love with my baby.” — Sienna Miller, actress, to E! News
- “There's just like, no is no. And they don't get it. And then the looks people give you on the flight. I was like, 'oh my God.'.. The baby's screaming, she's screaming. I got to the immigration line and just broke down. I was just like, what am I doing?” — Sienna Miller, on *The Tonight Show*
Why It Matters
The birth underscores Miller’s navigation of motherhood in her mid-forties while expanding her acting portfolio, and her role in *Jack Ryan: Ghost War* marks a high-profile return to mainstream cinema, potentially influencing public perceptions of age-diverse parenting and career longevity.
What’s Next
Miller will juggle newborn care with promotion for *Jack Ryan: Ghost War* ahead of its 20 May debut. Sources suggest the couple may temporarily scale back demanding projects to focus on family, though details remain private.
