Ratchagan is a 1997 Tamil action film, directed by Praveenkanth, starring Nagarjuna and Sushmita Sen in the lead role, whilst also starring Raghuvaran, S. P. Balasubramanyam, Vadivelu and Girish Karnad. The soundtrack was composed by A. R. Rahman. It held the record for the costliest Tamil film at that time. After tremendously positive reviews, the film became the highest grossing film in Tamil Nadu until the release of Titanic in 1997. Tremendous Music by A R Rehaman. The famous song "Sonia Sonia" is in this movie.