The actress, 44, already shares a daughter with the model, 29, who they welcomed in January 2024, as well as 13-year-old Marlowe with ex-boyfriend Tom Sturridge .
Since the early aughts, Sienna Miller has been the go-to inspiration for boho beach waves, milky skin, and pinch-me cheeks.
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Pregnant Sienna Miller Shows Off Her Baby Bump as She Makes Her Return to Instagram After 8 Years
Back in December, the actress debuted her baby bump at the 2025 Fashion Awards in London ...
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