Add Uma Thurman to the list of reasons that 40 is the new 30. It was revealed Monday that the 41-year-old actress will have her third child and first with financier Arpad Busson, whom she has been with since 2007. Thurman has two kids—a daughter, Maya, 13, and a son, Levon, 10—from her marriage to Ethan Hawke. Busson, 49, and Thurman split briefly in 2009 but have been together ever since. The Kill Bill star is set to appear in a five-episode arc on the new NBC show Smash, the first airing next Monday, March 5.