Entertainment Tonight ET Online ETOnline.com

Simon Helberg recently tied the knot in the season finale of the CBS hit, but in real life, the actor, 31, just achieved another happy milestone-- he and wife Jocelyn Towne welcomed their very first child.

VIDEO: 'Big Bang' Star Gets Animated for 'Kick Buttowski'

Us Weekly confirms the pair became new parents to a daughter named Adeline on May 8.

The family is thrilled," a source tells the magazine. "Simon is excited to be a father -- he's been doing his reading."

VIDEO: 'Big Bang Theory' Cast Celebrates 100th Episode

Helberg and Towne tied the knot in 2007.