Sattam En Kaiyil is a 1978 Indian Tamil-language action film written, produced and directed by T. N. Balu. The film stars Kamal Haasan and Sripriya, while Sathyaraj made his screen debut. It was released on 14 July 1978 and became a success. The film was remade in Hindi as Yeh To Kamaal Ho Gaya (1982), with Haasan returning.

Rangaraj Subbiah, professionally known as Sathyaraj, is an Indian actor, producer, director and a media personality who appears predominantly in Tamil films. He also appears in works in Telugu, Malayalam, Kannada and Hindi.