Just hours after sending Conan O'Brien into Tonight Show retirement with a rendition of "Free Bird" on his final episode on NBC, Will Ferrell was still rocking.

He and wife Viveca Paulin welcomed their third son - a boy by the rock n' roll approved name of Axel Ferrell! The little guy arrived on Saturday morning.

"All the Ferrells are well," said his rep, who confirmed the news.

Baby Axel joins older brothers Magnus, 5 1/2, and Mattias, 3.

Will Ferrell and Viveca Paulin, who met in an acting class 15 years ago and wed back in 2000 – announced her third pregnancy back in September.

Congratulations to the happy couple - and family!