Kirby, who died Monday, had only recently been diagnosed with leukemia, according to a statement by his wife actress Lynn Sellers.

Born in New York on April 28, 1949, Kirby had a prolific 30-year career acting in films and on television. He had accrued a list of roles when cast as Clemenza in "The Godfather Part II," assisting the young Don Corleone to dispose of a carpet, E! Online reported.

His film roles included "This is Spinal Tap," "The Freshman," "Donnie Brasco," "Good Morning Vietnam" and "Sleepers." In 1989, Kirby was Crystal's writer friend Jess who did not understand the appeal of Sally, Meg Ryan's character in the hit comedy "When Harry Met Sally."

On TV, he did guest spots on "Mad About You" and "Frasier," Homicide: Life on the Street" and other shows. Kirby recently appeared as a producer devastated by the loss of his Shrek doll on the Home Box Office show, "Entourage."