Uma Thurman Expecting Third Child

 There's a baby on the way for Uma Thurman.

The actress, 41, is set to welcome her first child with financier Arpad Busson, a rep for Thurman confirms to PEOPLE exclusively.

Thurman, whose bump went unnoticed when she stepped out for New York Fashion Week earlier this month, has two children – daughter Maya, 13, and son Levon, 10 – with ex-husband Ethan Hawke.

She and Busson, 49, began dating in 2007 and, after a brief split in 2009, have been together since.

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