Mouna Ragam (English: Silent Symphony), also spelt Mouna Raagam, is a 1986 Indian Tamil-language romantic drama film written and directed by Mani Ratnam and produced by G. Venkateswaran. The film narrates the life of Divya Chandramouli (Revathi), who is robbed of her carefree existence when she reluctantly marries Chandrakumar (Mohan). Divya, mourning the shooting death of her former lover Manohar (Karthik), does not really want to be married. The story follows Divya's inner conflict between holding onto her past and coming to terms with the present and making a life with Chandrakumar.
The film's development began when Ratnam wrote a short story, "Divya", while he was making his first film (1983's Pallavi Anu Pallavi). As the script developed, he renamed it. Ratnam did not plan to film the story until he had finished writing it, and could not begin production until the release of his fourth film (1985's Idaya Kovil). Mouna Ragam was filmed primarily in Chennai, with additional filming in Delhi and Agra. The soundtrack album and background score were composed by Ilaiyaraaja, with lyrics by Vaali. P. C. Sreeram was the film's cinematographer, and its art director was Thotta Tharani. It was edited by B. Lenin and V. T. Vijayan.
Mouna Ragam was released on 15 August 1986, India's Independence Day. Despite a modest beginning, it became a box-office success. The critically acclaimed film received the National Film Award for Best Feature Film in Tamil, and Ratnam received the Filmfare Award for Best Tamil Director. Mouna Ragam was later dubbed in Telugu with the same title, and was remade in Hindi in 1992 as Kasak with Rishi Kapoor and Neelam Kothari in the lead roles.