Sienna Miller, 44, shows off her toned abs in a crop top six months after giving birth as she runs errands in LA

Published: 04:48 EST, 12 November 2026 | Updated: 04:55 EST, 12 November 2026 Sienna Miller has kept up her busy schedule after welcoming her third child six months ago.After a hectic few weeks promoting her new movie Madden and her TV drama War and flitting between London and the US, the English actress is enjoying some downtime in Los Angeles.Sienna, who welcomed her baby boy in May, looked happy and relaxed as she ran errands in a cropped t-shirt on Wednesday.The star, 44, showed off her abs in the white tee which she teamed with low-slung grey joggers and a white hoodie.Sienna and her fiancé Oli Green, 30, have been enjoying some time in LA recently, with their baby son and daughter, who they welcomed in January 2024.Sienna also has a 14-year-old daughter, Marlowe, with her ex Tom Sturridge, 40, who she dated for four years. He is engaged to model Alexa Chung, 43. Sienna Miller is enjoying some downtime in Los Angeles. The actress, who welcomed her baby boy in May, looked happy and relaxed as she ran errands in a cropped t-shirt on WednesdayWhilst the family have been enjoying their time in the US it was revealed last week that the actress has spent £9.3million on a house in Notting Hill, west London.The sprawling property will provide a new family home for Sienna and her fiance, with whom she's been in a relationship since 2021. Oli proposed to Sienna during a walk in Central Park shortly after she gave birth to their second child together.Appearing on Jimmy Fallon's The Tonight Show earlier this year, Sienna revealed that her partner popped the question the day after she was last on the show on May 14 – three weeks after giving birth.Detailing the proposal, she said: '[We] went for a walk in Central Park, popped the old question.''And you just had the baby,' Fallon said. 'Yeah, I was not looking my best,' Sienna laughed before Fallon asked: 'Wait, did you know it was going to happen?' Sienna and her fiancé Oli Green, 30, have been enjoying some time in LA recently, with their baby son and daughter, who they welcomed in January 2024She replied: 'No, not in the slightest. And when I kind of got the feeling something was up, I was like, "Please God, not now".'I had the greasiest hair, sort of stains on the T-shirt. It was, yeah, it was full postpartum beauty.'Fallon said: 'So a nice romantic stroll and you're like, "Oh this is cool".'Sienna continued: 'Yeah and then, "Why is he being weird?" Suddenly, chat, chat and then quiet and a bit sweaty-palmed.''I was like, "Please God no". I was like, "Ooo this is romantic." Oh like, you know, "Look at the birds", you know.'