Krishnankoil Venkadachalam Mahadevan (14 March 1918 – 21 June 2001) was an Indian composer, singer-songwriter, music producer, and musician known for his works in Tamil cinema, Telugu cinema, Kannada cinema, and Malayalam cinema. He is best known for his contributions in works such as "Manchi Manasulu" (1962), "Lava Kusa" (1963), "Thiruvilaiyadal" (1965), "Saraswathi Sabatham" (1966), "Kandan Karunai" (1967), "Thillana Mohanambal" (1968), "Adimai Penn" (1969), "Balaraju Katha" (1970), "Athiparasakthi" (1971), "Sankarabharanam" (1979), "Saptapadi" (1981), "Sirivennela" (1986), "Sruthilayalu" (1987), "Pelli Pustakam" (1991), and "Swathi Kiranam" (1992).