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Sienna Miller welcomed her third child just days ago in a joyful milestone. The 44-year-old actress confirmed the arrival while radiating happiness about her expanding family. This newest addition marks her second baby with boyfriend Oli Green, 29, as the couple continues building their life together with remarkable devotion.
🔥 Quick Facts
- Birth Date: May 11, 2026, four days before announcement
- Baby’s Details: Sex and name not yet publicly revealed
- Age Gap: Sienna is 15 years older than boyfriend Oli Green
- Family Size: 13-year-old daughter Marlowe with Tom Sturridge; 2-year-old daughter with Oli Green
A Joyful Arrival Confirms Her Expanding Family
Sienna Miller revealed the news during a recent interview with E! News, keeping the announcement intimate and personal. The actress shared she’s running on very little sleep but couldn’t be happier about her new role. She spoke warmly about the experience while discussing her work on film projects, showing how motherhood and career coexist effortlessly. The birth comes just four days after Miller went public with the joyful update, keeping early details close to her heart.
According to multiple reports, the newborn is healthy and the family is adjusting beautifully at home. Friends close to the couple describe Oli Green as deeply involved in supporting Miller through this transition. The actor and model has been photographed beaming with pride, celebrating what sources describe as one of the happiest periods of their relationship.
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Sienna Miller at 44 Embraces Motherhood with Renewed Energy
The British-American actress has spoken candidly about the differences between having her first child at a younger age and welcoming babies in her forties. At age 44, Miller brings maturity and perspective to motherhood that she credits to life experience. She previously revealed that having babies later in life feels easier emotionally and physically than when she was a young mother to Marlowe at age 26. Her openness about this journey has resonated with fans facing similar life decisions.
The actress has defended relationships with significant age gaps in interviews, stating that mature women and younger men can have deeply fulfilling partnerships. Miller emphasizes the importance of genuine connection over societal expectations, demonstrating confidence in her personal choices. Her relationship with Oli Green began in early 2022 and has steadily deepened with each milestone they’ve shared.
A Love Story Built on Genuine Connection and Growing Family
| Detail | Information |
| Sienna’s Age | 44 years old |
| Oli Green’s Age | 29 years old |
| Relationship Start | Early 2022 |
| First Child Together | January 2024 (daughter) |
In recent interviews, Sienna Miller has become refreshingly honest about her relationship with Oli Green. Despite the 15-year age difference, the couple shares genuine affection and mutual support. Miller’s first child, Marlowe, was born in July 2012 with actor Tom Sturridge, whom she was engaged to before their split. That relationship shaped her expectations for future partnerships.
The couple’s journey together began just years after Miller and Sturridge parted ways. Today, Marlowe is a 13-year-old teenager, and she has embraced her mother’s growing family with grace. Oli Green has become a stable, loving presence in Miller’s life, supporting both her career ambitions and her maternal role across generations of children.
“I have a tiny baby next door. 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
How Sienna Miller Announced Her Third Pregnancy Last Year
Sienna Miller made headlines in March 2026 when she returned to Instagram after an eight-year hiatus to announce her pregnancy. The actress posted a selfie proudly showing off her baby bump, taking fans completely by surprise. She had maintained privacy from social media for years, making this announcement particularly meaningful and personal. The pregnancy reveal quickly went viral, sparking conversations about women having babies later in life.
Prior to that announcement, Miller had kept her pregnancy quiet, letting her body speak for itself at industry events. She appeared radiant at the 2025 Fashion Awards, where her Givenchy gown perfectly framed her visible bump. The fashion moment became iconic, showing her confident embrace of motherhood at every stage of her career.
What’s Next for the Busy Actress and New Parents?
With newborn in hand, Sienna Miller has been balancing motherhood with professional commitments. She recently conducted interviews while promoting ‘Jack Ryan: Ghost War’, showing her dedication to her film career. Friends and colleagues have praised her graceful approach to juggling major life changes. The actress has demonstrated repeatedly that motherhood and creative pursuits can coexist beautifully.
The question now is how Miller and Oli Green will prioritize family time while maintaining their individual professional goals. Sources suggest the couple is considering taking time off from demanding projects to enjoy the newborn years. Miller has been forthright about protecting her children’s privacy, so details about the baby’s name and sex will likely remain private unless she chooses to share them.
Sources
- E! News – Exclusive interview covering Sienna Miller’s third child announcement and relationship details
- People Magazine – Coverage of the birth, family timeline, and quotes from sources close to the couple
- The Independent – Feature article on Sienna Miller’s pregnancy journey and motherhood at 44
