Larry King: No Viagra For Me! (VIDEO)

12/21/2010 10:23 am ET | Updated May 25, 2011

Larry King finished up on "Larry King Live" Thursday night, and by Monday was sitting down with Jay Leno on "The Tonight Show."

King, who has said he aspires to a standup comedy career now that his CNN show is done, performed a routine on the show, but his funniest line may have come when discussing his children.

When pressed by Leno on the age difference between his children, King said his oldest child is 55 and his youngest child is 10.

"Without Viagra, 10," the 77-year-old said.

WATCH: