Actor Justin Bartha is a first-time dad

Justin Bartha has become a dad following the birth of his daughter.

Hangover star Justin Bartha has become a dad following the birth of his daughter. (AAP)

The Hangover star's new wife, personal trainer Lia Smith, went into labour last week and the little girl was born on April 13, according to Us Weekly magazine.

This is the first child for Bartha and Smith, who wed in Hawaii in January.