The Fantastic Miss Piggy show [VR] 1989: credits (John Ritter)

Halliwell's filmgoer's companion, 1988 (Ritter, John, 1948- )

Washington Post, Sep 12, 2003 (John Ritter; d. Sep. 11, 2003, age 54)

IMDB, 23 August 2018 (John Ritter; Jonathan Southworth Ritter; actor, producer; born September 17, 1948 in Burbank, California, USA; died September 11, 2003 (age 54) in Burbank, California, USA)