Viswanathan–Ramamoorthy were an Indian music composing duo composed of M. S. Viswanathan and T. K. Ramamoorthy. They worked together on over 100 films, from 1952's Panam to 1965's Aayirathil Oruvan. After their split, Ramamoorthy worked on 16 films between 1966 and 1986. He and Viswanathan reunited in 1995 for Engirundho Vandhan.