Sienna Miller and Fiancé Tom Sturridge Welcomed Their Baby Over the Weekend

Sienna Miller attends the Burberry Spring Summer 2012 Womenswear Show at Kensington Gardens on September 19, 2011 in London, England. Photo: Gareth Cattermole/Getty Images

And it's reportedly a girl, according to Us Weekly. No name has been announced, but she comes into the world having already posed for British Vogue (while in the womb).