Congratulations are in order for Sienna Miller , who is pregnant with her third child. The Horizon actress, 43, has been dating actor Oli Green , 28, since 2021, and in 2024, they welcomed their first child together, a daughter whose name they have not disclosed.

The soon-to-be mom-of-three is also already a mom to teenager Marlowe, 13, who she shares with ex Tom Sturridge ; the two were together from 2011 to 2015.

Sienna revealed her pregnancy while attending The Fashion Awards 2025 at the Royal Albert Hall in London, which she attended alongside her boyfriend.

© Getty Images Sienna wore a Givenchy dress for the night out

The New York City native, a longtime ambassador for fashion brand Chloé, highlighted her baby bump by stepping out in a long, white tulle, see-through go

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