Manayangath Subramanian Viswanathan (24 June 1928 – 14 July 2015), also known as M.S.V., was an Indian music director, singer and actor who predominantly worked in Tamil film industry. He was popularly known as Mellisai Mannar. He composed songs for more than 800 Indian films and various albums across languages primarily in Tamil, Malayalam and Telugu films. Viswanathan composed film music together with composer and violinist T. K. Ramamoorthy from the 1950s to 1965, as Viswanathan–Ramamoorthy for 400 Films. He independently composed for 700 films from 1965 to 2013. KiranPrabha gave a detailed account of MSV life journey and also his association with TK Ramamurthy.