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 barber.

J. Alexander, known professionally as Mahendran, was an Indian film director, screenwriter and actor, known for his work in the Tamil film industry. Mahendran is regarded as one of the greatest film makers of Tamil cinema and has influenced several filmmakers of the generations that followed.