Sienna Miller has experienced motherhood at several different stages of life. And now, in her mid-40s, she says the journey feels more peaceful than ever.
The 44-year-old actress recently spoke about her third pregnancy in an interview with Glamour, reflecting on how becoming a parent later in life has brought a different kind of confidence and calm.
For Miller, the contrast is striking. She welcomed her first child at 29. Now, expecting another baby at 44, she says the experience feels less chaotic — and far more grounded.
Finding Stability Later in Life
Miller believes age has made a meaningful difference.
Looking back, she described her 30s as a period of constant movement — a time when many people are still figuring out careers, relationships, and long-term goals.
By her 40s, she says, that noise had quieted.
Life feels more settled now, she explained, which makes the rhythm of pregnancy easier to embrace. Even small moments — like reading a book in bed by 9 p.m. — bring a sense of contentment.
It’s a shift she didn’t necessarily expect when she was younger.
A Growing Family
Miller is currently expecting her third child and her second with boyfriend Oli Green, 29.
The couple welcomed a daughter together at the end of 2023. Miller is also mother to 13-year-old Marlowe, whom she shares with her former partner, actor Tom Sturridge.
Her pregnancy first became public at the 2025 Fashion Awards in London, where she appeared on the red carpet at the Royal Albert Hall with a visible baby bump.
More recently, on March 20, Miller returned to Instagram after an eight-year break from the platform, sharing a photo that highlighted her pregnancy.
Rethinking the Conversation Around Age
Alongside personal reflections, Miller also addressed the wider conversation about women having children later in life.
She questioned why pregnancy in one’s 40s still attracts criticism or surprise, especially when men often become fathers much later without facing the same scrutiny.
The actress said that reaching her 40s has given her a stronger sense of self — and less concern about outside opinions.
That confidence played a role in her decision to expand her family again.
Planning for Possibilities
Miller also revealed that she froze her eggs in her late 30s.
Although she ultimately conceived naturally and did not use them, she said the process offered a sense of relief at the time.
Knowing that option existed helped ease the pressure many women feel about the timeline of fertility.
Why the Conversation Matters
Miller’s reflections come at a time when more women are choosing to have children later in life.
In many parts of the U.S., UK, Canada, and Australia, the average age of first-time mothers has steadily risen as careers, education, and financial stability shape family planning.
For some, Miller’s experience mirrors a broader cultural shift: motherhood no longer follows a single timeline.
Instead, it unfolds differently for each family — sometimes later, sometimes unexpectedly, and often with a new sense of perspective.
For Miller, that perspective seems to have arrived at exactly the right moment.
