John Devon Roland Pertwee (; 7 July 1919 – 20 May 1996), known professionally as Jon Pertwee, was an English actor. Born into a theatrical family, he became known as a comedy actor, playing Chief Petty Officer Pertwee (and three other roles) in the BBC Radio sitcom The Navy Lark (1959–1977) and appearing in four films in the Carry On series (1964–1992).

On television, Pertwee starred as the third incarnation of the Doctor in the long-running science fiction series Doctor Who (1970–1974), hosted the game show Whodunnit? (1974–1978), and played the title character in Worzel Gummidge (1979–1981 and 1987–1989). Towards the end of his life he maintained a close association with Doctor Who by appearing at many fan conventions related to the series and giving interviews.