Will Ferrell a father again?

The 'Elf' actor announced the happy news during an interview on 'The Tonight Show'.

He told host Jay Leno: "My wife is pregnant again. Ferrell then joked: "I'm not the father though. Chuck Norris is the dad." The comedian and his wife, 37-year-old Viveca Paulin, who tied the knot in 2000, already have a son, Magnus, two. Ferrell added: "We've been trying to tell him, 'Mommy has a baby in her belly.' Then one day he was like, 'Mommy has a baby in her head!' "My wife does have an abnormally large head. It's grotesque, but I said, 'No, no she doesn't,' and we had a laugh." Will, 39, shot to fame as part of the 'Saturday Night Live' team.

He then went on to become a star in his own right, appearing in a string of hit films, including 'A Night at the Roxbury', 'Old School' and 'Wedding Crashers'.