'The Big Bang Theory's' Simon Helberg, wife Jocelyn Towne expecting second child

simon-helberg-jocelyn-towne-expecting-second-child-gi.jpgOne "Big Bang Theory" actor's brood is about to get a whole lot, well, bigger.

Star Simon Helberg, who plays the snarky Howard Wolowitz on the hit CBS comedy, and his wife Jocelyn Towne are expecting their second child. The actor revealed his exciting news to Entertainment Tonight on the red carpet at the Screen Actors Guild Awards on Saturday (Jan. 18).

"Yes, my wife is [expecting,] -- I can't take all the credit," Helberg tells ET's Nancy O'Dell. "Every time I come to the SAG Awards there's something about this night ... About eight months before [the SAG Awards] I get, really, the urge. I feel the romance, and then we get nominated, so it's hand in hand."

Helberg and Towne welcomed their first child, daughter Adeline, on May 8, 2012.

Congrats to the happy parents!
Photo/Video credit: Getty Images
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