Sienna Miller is journeying into motherhood once again, as she prepares to welcome her third child alongside her partner, Oli Green. The couple, who began their relationship in 2022, are gearing up for this exciting new chapter in their lives. Miller, who is 44, has shared her thoughts on pregnancy in her 40s, declaring it to be a particularly enjoyable experience.
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In a recent interview with Glamour, Miller expressed her belief that being pregnant later in life is advantageous. Reflecting on her previous pregnancies, she noted the contrast between having her first child at 29 and navigating motherhood now. “Having had a baby at 29, and then having a baby at 42, and now at 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 explained.
Miller appears to have cultivated a more relaxed approach to life as she has matured. She remarked on the joy of simple pleasures, sharing, “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. Life is in a more grounded space.” Her perspective reflects a notable shift from the chaotic feelings often associated with one’s 30s, where ambitions and the desire for stability can create pressure.
Entering her 40s has afforded Miller a newfound self-awareness. “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. This clarity seems to be a significant factor in her decision to expand her family. In her words, she feels like a “much more grounded human.”
In her conversation with Glamour, Miller touched upon societal expectations surrounding parenthood. She posed a thought-provoking question: “We don’t judge men who are having kids in their 80s. Why on earth is there any sort of narrative?” This statement highlights the double standards often present in discussions about parenthood and age, especially regarding women.
Miller also revisited her experience with fertility, revealing that she had chosen to freeze her eggs in her late 30s, although she ultimately did not use them. Despite this, she expressed relief over having taken that precaution, admitting it provided “existential relief” as she now seeks to balance life with her blossoming family.
On social media, Miller has recently reactivated her Instagram presence after an eight-year break, marking the occasion with a post displaying her baby bump. Her public announcement followed her appearance at the 2025 Fashion Awards in London, where she confidently walked the red carpet, proudly showcasing her pregnancy.
This forthcoming addition to Miller’s family will be her third child. She shares her eldest daughter, Marlowe, 13, with her ex-partner Tom Sturridge, while her second child, a daughter, was born with Green at the end of 2023. As she prepares for this new arrival, many are keen to witness how her evolving journey in parenthood continues to unfold.
Despite repeated requests for comment, Miller’s representatives have not yet provided any additional information regarding her pregnancy. Nevertheless, her candid insights on motherhood, age, and societal expectations resonate with many and reflect a broader conversation about the evolving norms surrounding family and parenthood.