Sienna Miller has welcomed her third child, a beautiful addition to her growing family, with her partner Oli Green. The actress, who is 44 years of age, shared this joyous news during a recent interview with E! News, although she chose not to disclose the name or sex of her newborn. Miller’s new arrival comes as the latest addition to her family, which includes a daughter with Green, born in late 2023, as well as her 13-year-old daughter Marlowe from her previous relationship with actor Tom Sturridge.
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In her interview, Miller gave an insight into the challenges of motherhood, particularly in the wake of her most recent birth. “It feels like stringing sentences together is a bit challenging,” she joked, adding, “I’m on very little sleep, but I’m madly in love with my baby.” This lighthearted admission highlights both the exhaustion and joy that often accompany the early days of parenthood.
Returning to social media after an eight-year break, Miller made her comeback in March. She marked the occasion by sharing a photograph of her baby bump, first revealing this exciting phase of her life during the 2025 Fashion Awards held at the Royal Albert Hall in London in December 2025. It was a radiant display of her pregnancy, showcasing not only her changing figure but also her confidence as she embraced motherhood again.
Miller’s reflections on the differences between her pregnancies in her 20s compared to her 40s provided fascinating insights. In an interview with Glamour, she explained her belief that being pregnant in one’s 40s is a much more enriching experience. “Having had a baby at 29, and then having a baby at 42, and now 44, it’s so much easier when you don’t have the conflict of feeling scattered and like you want to be doing X, Y, Z,” she shared, indicating that her priorities have shifted significantly.
The actress expressed a contentment in her current stage of life, stating, “If I’m in bed at 9 p.m. with a book, I’m so happy now. And now I’ve got the excuse to do it.” This sense of groundedness, she believes, stems from the chaotic nature of her 30s, a decade she describes as a period dominated by the search for stability and family life.
As she discussed her journey into this new chapter, Miller noted the empowerment that comes with self-acceptance in her 40s. “But by the time you hit 40, you’re like, ‘I kind of know who I am. I don’t really give a s–t about what anyone else thinks,’” she said, reflecting on the personal growth that accompanies reaching middle age.
In a thought-provoking moment, she expressed her frustrations surrounding societal perceptions of parenthood, particularly for women. “We don’t judge men who are having kids in their 80s. Why on earth is there any sort of narrative?” Miller questioned. This impactful statement resonates with many, as it challenges the traditional views often placed on women’s reproductive choices and timelines.
Sienna Miller’s experience serves as a reminder of the diversity of motherhood and the various perspectives that come with age. Each journey is unique, and as she navigates this new phase with both love and humour, she remains a relatable figure for many who have similarly delayed parenthood due to career, personal growth, or other life circumstances.
As Miller continues to embrace her role as a mother, the insights she shares reflect a more modern outlook on family and career, wherein women can feel empowered to forge their paths while balancing motherhood in a way that suits them best. It is a refreshing perspective that many will undoubtedly admire as they follow her journey through motherhood and beyond.