Johnny is a 1980 Indian Tamil-language crime thriller film written and directed by Mahendran. The film stars Rajinikanth, Sridevi and Deepa. Featuring Rajinikanth in a dual role, it revolves around the eponymous con artist who is implicated for a crime committed by Vidyasagar, a lookalike.

Johnny is the first original script directed by Mahendran. It was released on 15 August 1980. Though the film disappointed audiences in the first two weeks of its run because its title gave the impression of an action entertainer, it picked up in the third week and became a commercial success, running for over 100 days in theatres.