Jack Black to be a dad again?

Jack Black is reportedly set to be a dad for the second time.

Black's wife Tanya Harden is pregnant, just 18 months after she gave birth to their son Sam, according to the National Enquirer.

A friend tells the tabloid: "Jack and Tanya are thrilled they're having another baby. Jack may have a reputation as a frat (party) boy - but he's very serious in his role as a father."

The couple married last March after eloping.