Congratulations to Sienna Miller and Tom Sturridge! The engaged couple reportedly welcomed a baby girl over the weekend. Known for her boho-chic style, with a dash of Brit edge, Sienna didn't let a lil thing like a baby bump interfere with her signature style over the past nine months. In fact, she made her style look even more glam while highlighting her growing midsection. In honor of her new baby girl, take a look back at Sienna Miller's ultrastylish maternity outfits and see how you can steal her look.