Funnyman Steve Martin has become a first-time father at the age of 67, according to a U.S. report.

They've had a baby, and how they kept it a secret nobody knows. Steve's very private. They are thrilled. They worked hard to have the baby

The Father of the Bride star and his wife Anne Stringfield welcomed the baby in December (12) but managed to keep their happy news under wraps until now.

A source tells the New York Post gossip column Page Six, "They've had a baby, and how they kept it a secret nobody knows. Steve's very private. They are thrilled. They worked hard to have the baby".

Martin married his second wife Stringfield in 2007 at a surprise ceremony where celebrity guests including Tom Hanks and Diane Keaton arrived expecting a party.