British actor Sienna Miller displayed her maternal glow on the red carpet in London on Monday during the 2025 Fashion Awards.

“The American Sniper” actor is expecting her third baby, her second with boyfriend Oli Green, E! News reported.

Miller showed off her baby bump at the event in a sheer white Givenchy gown.

This baby will be joining 13-year-old daughter Marlowe, whom Miller had with ex Tom Sturridge, as well as a 23-month-old daughter with Oli, the media outlet wrote.

In the past, Miller has shared that it took some time for Marlowe to get used to being an older sibling.

“Initially, it was a lot for her,” Miller told E! News in June 2024. “And now she is in heaven.”

The “Factory Girl” actor added that her toddler was “already idolizing” Marlowe at the time and “beaming every

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