Sienna Miller is officially a mom of three 💛 “I’m on very little sleep, but I’m madly in love with my baby," the actress, 44, revealed in an interview with E! News, keeping the name a mystery. Sienna welcomed the little one with boyfriend Oli Green, 29, their second child together after they welcomed their first daughter in 2023. She's also mom to daughter Marlowe, 13, whom she shares with ex Tom Sturridge. 📸 : Getty #NewBaby