Hero is a 2019 Indian Tamil-language superhero film directed by P. S. Mithran, who co-wrote the film with Pon Parthiban, Savari Muthu and Antony Bhagyaraj. The film was produced by Kotapadi J. Rajesh under his production house KJR Studios. It stars Sivakarthikeyan, Arjun Sarja, Kalyani Priyadarshan, Ivana and Abhay Deol in prominent roles. This film marks the Tamil film debuts of Kalyani and Deol. The music for the film is composed by Yuvan Shankar Raja, with cinematography done by George C. Williams, and editing done by Ruben.

The film was wide released on 20 December 2019. Prior to its release, filmmaker Bosco Prabhu accused Mithran for plagiarising his story. In April 2020, the Madras High Court issued an interim order banning the film from television and streaming platforms, due to which it was taken down from Amazon Prime Video. The ban was lifted in May 2020 once the issue was resolved. The film received generally mixed reviews, with praise directed towards the performances( particularly Arjun), cinematography, story, action sequences and themes, and criticism for its screenwriting, characterization and pacing.