Jack Black and his wife, Tanya Haden, are parents of a baby boy, the actor said.
"I'm going to be the best daddy on the planet and I'm going to enter the best daddy competition. And I'm going to win it," Black said in a story posted on the Web site of the magazine Us Weekly.
"I've got the babe back at home safe and sound and I'm actually very anxious to get back" to them, Black, 36, told the program.
Neither Us Weekly nor "Access Hollywood" reported the baby's name.
Black has starred in films including "The School of Rock" and "King Kong," and has a band called Tenacious D.
Haden, 35, is a cellist and the daughter of jazz great Charlie Haden.