Amy Graves / 1 / 7
Amy Graves / 1 / 7

Will Ferrell and his wife helped Conan O'Brien say goodbye on the "Tonight Show," then said hello to a new arrival with baby number three.

RELATED: Check out the Celebrity Babies Superfans page!

Just hours after the couple performed "Free Bird" on Conan's final show, People reports, the actor and wife Viveca Paulin, who was very obviously pregnant while dancing during the finale, welcomed their third son.

RELATED: See more pics of Will Ferrell

According to People, they named their baby boy Axel Ferrell, who arrived Saturday morning in Los Angeles. "All the Ferrells are well," their rep said.

RELATED: Read more about Will Ferrell

Axel joins older brothers Magnus, 5, and Mattias, 3.