A publicist for The Big Bang Theory star Simon Helberg has confirmed reports suggesting the actor is a new dad.

Helberg's wife Jocelyn Towne gave birth to the couple's second child, a son called Wilder, on 23 April (14).

The actor confirmed he was set to become a dad again on the red carpet at the Screen Actors Guild Awards in January (14) - two years after making a similar appearance when Towne was expecting their first child, daughter Adeline.

Joking about the pregnancy with U.S. news show Entertainment Tonight, Helberg quipped, "About eight months before (the SAG Awards) I get really the urge."

Helberg wed Towne in 2007.