Celeb bump day: Sienna Miller, Kristin Cavallari and more!

Feb 22, 2012 at 1:00 p.m. ET

Happy Wednesday hump day -- or, as we like to call it, celebrity bump day! We have rounded up the cutest pregnant celebrities of the week, including a newly pregnant Sienna Miller, Kristin Cavallari’s Fashion Week maternity style, Kourtney Kardashian’s cute maternity rain gear and Alessandra Ambrosio’s model perfect baby bump.

Pregnant Sienna Miller

Sienna Miller

Actress Sienna Miller showed off her baby bump in a pale pink lace dress while on location for her new movie, A Case of You, in New York City.

The 30-year-old actress is expecting her first child with her boyfriend Tom Sturridge. Miller is rumored to be engaged. However, she hasn't confirmed the engagement or pregnancy, preferring to let her baby bump do the talking for her!

Also check out: 5 Tricks to hide your baby bump when you're not ready to tell >>

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