John Ritter John Ritter 9/17/48 Actor Biography There is no information about «John Ritter» yet. Roles Jack Tripper (Actor) Three's Company Detective Harry Hooperman (Actor) Hooperman John Hartman (Actor) Hearts Afire Paul Hennessy (Actor) 8 Simple Rules Jack Tripper (Actor) Three's a Crowd Ben Hanscom (Actor) Stephen King's It Gallery