British-American actress Sienna Miller has opened up about experiencing her third pregnancy in her 40s.
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In a latest interview, the 44-year-old actress, who is expecting her third baby, and second with boyfriend Oli Green, said she thinks “being pregnant in your 40s is the best”. Miller is mom to a daughter with Green, 29, and also shares daughter Marlowe, 13, with her ex Tom Sturridge.
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“Having had a baby at 29, and then having a baby at 42, and now 44, itโs so much easier when you donโt have the conflict of feeling scattered and like you want to be doing X, Y, Z,” Miller said.
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“If Iโm in bed at 9 p.m. with a book, Iโm so happy now,” Miller continued. “And now Iโve got the excuse to do it. Life is in a more grounded space. I think the 30s are chaos. Youโre like, ‘I want to settle down. I want kids.'”
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The โ21 Bridgesโ actress revealed she is more relaxed in her 40s, and how it went into her decision to have her third baby.
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“But by the time you hit 40, youโre like, ‘I kind of know who I am. I donโt really give a s–t about what anyone else thinks,'” Miller said. “Iโm a much more grounded human.”
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Miller also shared that she was glad she froze her eggs, even though she “didn’t use them.”
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“I was really fortunately able just to get pregnant, but it was an existential relief having done that in my late 30s,” Miller added of conceiving her third baby.
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On March 20, the โAnatomy of a Scandalโ actress returned to Instagram following an 8-year-hiatus, with a post in which she showed off her baby bump.
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Miller initially debuted her baby bump at the 2025 Fashion Awards in London at the Royal Albert Hall as she walked the red carpet in December 2025.