Pagal Nilavu (transl. The Daytime Moon) is a 1985 Indian Tamil-language gangster film directed by Mani Ratnam, starring Murali, Revathi and Sathyaraj. It is about a carefree youth caught between his loyalty to a mafia don and his love for a cop's sister. The film's score and soundtrack were composed by Ilaiyaraaja which were widely acclaimed, while the cinematography of the film was handled by Ramachandra Babu. Pagal Nilavu marked Mani Ratnam's entry into Tamil cinema.