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

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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/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).