Dangerfield's widow, Joan Dangerfield, organized the tribute last Sunday. The legendary comedian died Oct. 5, 2004 following complications from heart valve replacement surgery.
Leno called Dangerfield "the greatest stand-up comedian of all time." Carrey said: "I'll never forget how kind he was to my father. I remember watching Rodney on 'The Ed Sullivan Show' as a child, and laughing, not because I got the jokes, but because my father was in hysterics."
A life-size bronze statue will be erected at Dangerfield's grave, and plans call for the posting of a slide show tribute by celebrity cartoonists on Dangerfield's Web site (rodney.com).