Will Ferrell and his wife, Viveca Paulson, celebrated the New Year early â€" with the birth of their second son on Saturday.

Mattias Ferrell was born just after 2 a.m. on Dec. 30. The couple already had a boy, Magnus, 2. In other words: the twin daughters of Diddy and Kim Porter have future dates lined up already.

In November, while on The Late Show with David Letterman to promote his movie Stranger Than Fiction, Farrell revealed that the baby would be a boy.

When asked if he knew the baby's gender, Ferrell responded: "You know, I don't know if I do," he said. "I've gotta check my BlackBerry."

He was joking, of course, as comedians often do. Next on the celebrity baby watch list: Jon Heder and his wife.