Overview
- Sienna Miller, who spoke to E! News on Monday, confirmed she has given birth to her third child.
- She said she is on very little sleep and "madly in love" with the newborn.
- Miller and partner Oli Green did not share the baby's name, sex, or date of birth.
- The couple already have a young daughter together whose name they have kept private, and Miller also shares her teenage daughter Marlowe with ex-partner Tom Sturridge.
- She revealed this pregnancy at the British Fashion Awards in December 2025 and has previously said she froze her eggs at 40 and finds parenting in her 40s easier.