Acting greats have appeared on James Lipton's studious show since it launched in 1994 and the host has made no secret of the fact Carrey was one of the names at the top of his original wish-list.
Lipton admits he has pursued the funnyman for 17 years.
He tells EW.com, "His was one of the first invitations I ever sent out, but Jim's extremely shy. It was a marathon getting him on. It wasn't that he didn't want to do it, he just didn't have the courage."
But after Cooper taped the show and heard that Lipton had been inviting Carrey to join him for years, The Hangover star decided to intervene.
And then Lipton bumped into Carrey when the actor was shooting new movie Mr. Popper's Penguins in New York.
Cooper's encouragement and the chance meeting eventually persuaded Carrey to sign on for the revealing show, which was taped recently and airs in America on Monday (10Jan11).