The actress and boyfriend Oli Green, 29, have expanded their family; Miller also shares 13-year-old daughter Marlowe with ex Tom Sturridge. She told E! News she recently had a tiny baby nearby, is running on little sleep and is madly in love.
Miller has spoken about why pregnancy in your 40s has felt easier and more grounded for her, noting past births at 29 and 42 and a greater confidence and calm now. She also returned to Instagram this spring after an eight-year break, having first shown her bump at the 2025 Fashion Awards.