Sienna Miller’s red carpet reveal: Baby no. 3

Sienna Miller, expecting her second baby with boyfriend Oli Green, her third overall, revealed her pregnancy at the 2025 Fashion Awards in London.

The 43-year-old actress, known for her role in Factory Girl, showed off her growing baby bump in a sheer white Givenchy gown, radiating maternal joy on the red carpet.

She is also mom to 13-year-old daughter Marlowe with ex Tom Sturridge, as well as a 23-month-old daughter with Oli.

As Marlowe prepares to become a big sister once again, Miller previously shared that adjusting to the teen’s role as an elder sibling required some time. “Initially, it was a lot for her,” she said, “and now she is in heaven.”

The sisterly bond appears to be mutual, as Miller added that her toddler is “already idolising” Marlowe and “beaming every time she sees her.” She noted, “Now that the baby can react, (she) is clearly in love with her big sister.” Miller has never hidden her desire to grow her family further, though she acknowledged the challenges women face conceiving after 40. To plan for the future, Miller froze her eggs to continue expanding her family with more peace of mind.