Mella Thirandhathu Kadhavu (transl. The door opened gently) is a 1986 Indian Tamil-language romantic musical film, written and directed by R. Sundarrajan starring Mohan, Radha and Amala. It was released on 12 September 1986 and became a commercial success. The film's score and soundtrack were composed by M. S. Viswanathan and Ilaiyaraaja together as per the credits; however the song tunes were composed by Viswanathan and orchestra arrangements were by Ilaiyaraaja.