Ratchagan (transl. Saviour) is a 1997 Indian Tamil-language romantic action film written, produced by K. T. Kunjumon, and directed by Praveen Gandhi. It stars Nagarjuna and Sushmita Sen, alongside Raghuvaran, S. P. Balasubrahmanyam, Vadivelu and Girish Karnad in supporting roles. The film released on 30 October 1997. It was the most expensive Indian film at the time of release. Notably, this marks the first and last Tamil debut of Sushmita Sen and remains the only Tamil film she has acted.