Celeb bump day: Uma Thurman, Oscar baby bumps and more!

Feb 29, 2012 at 11:30 a.m. ET

Happy Wednesday Hump Day -- or, as we like to call it, Celebrity Bump Day! This week we welcome a newly pregnant Uma Thurman to our list of expecting celebrity moms. We also drool over the amazing Oscar fashions of pregnant moms Kourtney Kardashian, Molly Sims and Alessandra Ambrosio.

Pregnant Uma Thurman

Uma Thurman

Baby bump watch! Uma Thurman announced this week that she is pregnant with her third child. The 41-year-old actress has two children (Levon, 10, and Maya, 13) with her ex Ethan Hawke. However, this is her first child with her boyfriend Arpad Busson. A source tells Life & Style she is "just a few months along" and due in "late, late summer."

Thurman kept herself covered up in layered flowing dresses and layered jackets at New York Fashion Week and at the Room to Grow Charity Gala (pictured above) before announcing her baby news. Can you spot her baby bump in this picture?

What other celebs got pregnant after the age of 40? Check out our list here >>

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