Sienna Miller, 41, gives birth with actor Oli Green, 27, after 'unplanned' pregnancy
Sienna Miller has become a mum again, aged 41, as she was seen out and about with her boyfriend Oli Green, 27, and their new baby.The actress looked happy as she held her newborn during a walk with her partner on Wednesday. She looked fab in a denim jumpsuit and long coat, with a beige baby carrier across her chest. New dad Oli looked smart in a long blue coat and grey scarf as he walked next to his partner and baby daughter.The star of Alfie, Factory Girl and Layer Cake let everyone know she was expecting last year when she showed off her baby bump at Vogue World, which was dubbed the UK's version of the Met Gala.