Jonathan Southworth Ritter (September 17, 1948 – September 11, 2003) was an American actor and comedian. He was the son of the singing cowboy star Tex Ritter and the father of actors Jason and Tyler Ritter. Ritter is known for playing Jack Tripper on the ABC sitcom Three's Company (1977–1984), for which he received a Primetime Emmy Award and a Golden Globe Award in 1984. He briefly reprised the role on the spin-off Three's a Crowd, which aired for one season.
Ritter appeared in over 100 films and television series combined and performed on Broadway, with roles including It (1990), Problem Child (1990), Problem Child 2 (1991), and Bad Santa in 2003 (his final live action film, which was dedicated to his memory). In 2002, Don Knotts called Ritter the "greatest physical comedian on the planet". His final roles include voicing the title character on the PBS children's program Clifford the Big Red Dog (2000–2003), for which he received four Daytime Emmy Award nominations, and as Paul Hennessy on the ABC sitcom 8 Simple Rules (2002–2003).