Sienna Miller has been promoting her new ad campaign for Charlotte Tilbury Beauty recently. Sienna and Charlotte are old friends, and Sienna did the ad campaign during her third pregnancy. She gave birth to her daughter Marlowe in 2012, when Sienna was 29/30, then Sienna decided to have babies with her current partner Oli Green. They welcomed a daughter in late 2023, and she was pregnant with their second (and third overall for Sienna) when this Glamour interview took place. She’s 44 and she now swears by “getting pregnant in your 40s.” That’s so… Sienna. Some interesting comments from Sienna on pregnancy and ageing:
Her favorite places in the English countryside: “I love Somerset and Dorset, which is like Thomas Hardy country. And I love Wales. But the Cotswolds are stunning. And by the time spring hits, it’s so euphoric that it’s like the best vibe. It’s just you have to get through the Winter months, which is so hard.”
Pregnancy in her 40s: “Yes. [Being pregnant in your 40s] is the best. 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. 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. I think the 30s are chaos. You’re like, “I want to settle down. I want kids.” But by the time you hit 40, you’re like, “I kind of know who I am. I don’t really give a sh-t about what anyone else thinks.” I’m a much more grounded human. We don’t judge men who are having kids in their 80s. Why on earth is there any sort of narrative?
She froze her eggs but didn’t use them: “And I froze eggs. That was really revealing. I didn’t use them. I was really fortunately able just to get pregnant, but it was an existential relief having done that in my late 30s.”
Pregnancy in your 40s is a biohack?? “It’s also good luck. You’re lucky if you get to get older. And getting pregnant and being older, I think is a biohack. You get all those hormones, you get all that blood. It’s great. I’m here for it.
On doing too much to stay young-looking: “You’re just advertising your insecurity if you look too young. I saw Hamnet, Jessie Buckley’s face. She’s young. She’s in her 30s. But it’s so beautiful to see women looking like human beings. I think my generation of actresses are doing really well with the not looking crazy.”
The modern trend really is “women having babies later and later,” and it’s cool to hear one woman describe the benefits of that. Because it feels like women are being inundated with the opposite message: that we need to start earlier, that we’re being selfish for waiting, that no one will want to have babies with a woman in her late 30s or 40s. And there’s Sienna with her younger lover/partner, saying “actually, those are all lies, you can have a younger boyfriend and have babies in your 40s and it’s awesome!”
BTW, Sienna welcomed her third child (second with Oli Green) in May. She hasn’t revealed any info about the baby, like a name or anything.
Photos courtesy of Avalon Red.
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- Sienna Miller beim Modeevent Vogue World 2023: London im Theatre Royal Drury Lane. London, 14.09.2023 *** Sienna Miller at the fashion event Vogue World 2023 London at Theatre Royal Drury Lane London, 14 09 2023 Foto:xS.xVasx/xFuturexImagex vogue_world_3819,Image: 805403267, License: Rights-managed, Restrictions: imago is entitled to issue a simple usage license at the time of provision. Personality and trademark rights as well as copyright laws regarding art-works shown must be observed. Commercial use at your own risk., Model Release: no, Credit line: IMAGO/Steve Vas / Avalon
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- Sienna Miller at Vogue World, Arrivals at The Theatre Royal, London, UK on 14th September 2023,Image: 806270892, License: Rights-managed, Restrictions: , Model Release: no, Credit line: Retna / Avalon
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- Sienna Miller arrives at The Fashion Awards 2025 at the Royal Albert Hall in London on 1st December 2025,Image: 1055911173, License: Rights-managed, Restrictions: , Model Release: no, Credit line: Manuela Langotsch/Avalon
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- Sienna Miller arrives at The Fashion Awards 2025 Presented By Pandora at Royal Albert Hall on December 1, 2025 in London.,Image: 1055963567, License: Rights-managed, Restrictions: , Model Release: no, Credit line: Olivier Huitel/Avalon
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- Sienna Miller and Charlotte Tilbury attending The Fashion Awards 2025 at the Royal Albert Hall in Kensington, London, United Kingdom,Image: 1056040519, License: Rights-managed, Restrictions: , Model Release: no, Credit line: Cat Morley/Avalon
Having had one baby at 29/30 and one at 41, I would agree. It’s wonderful to be able to do it again at an age where I know myself better, I know more about what to expect and I’m clear the type of mother I am (and am not). I would not have wanted to start later (personally) – the transition from complete freedom to motherhood was hard enough at 30.
And I’m so grateful I didn’t start sooner. My aunt (who had her children at 39 and 44) warned me (when I was in my late teens) to wait until after I’d finished school and traveled and could commit to motherhood without regretting or feeling like I was missing out. I’m really grateful I listened to her.
I think she’s probably right that many women feel emotionally ready for pregnancy and having a baby in their forties–more established, better able to enjoy it etc. But how do we square that with fertility? I know lots of women who were struggling to get pregnant even in their late thirties. I had my babies at 32 and 35, which isn’t even young for pregnancy, and I think I would have enjoyed it much more doing it in my forties. But there is a risk that you’ll encounter fertility problems the longer you wait, and you need to have a lot of money to throw at the problem.