Ghantasala Sai Srinivas Thaman Siva Kumar, popularly known and credited as S. Thaman is an Indian film music composer, who predominantly works in Telugu and Tamil cinema.
Although Thaman entered the film industry as an actor in a supporting role in the film Boys, he soon turned film composer and became popular for his work as a music director. His debut film as music director was the Tamil film Sindhanai Sei, while his first Telugu film was Kick.
He was born in Andhra Pradesh, India into a Telugu Brahmin family. He is the grand child of Ghantasala Balaramayya, director and producer, known for producing the Telugu film Seetarama Jananam, the debut film of Akkineni Nageswara Rao. Thaman hails from a family of musicians from Pottepalem, Nellore District. His father Ghantasala Siva Kumar was a Drummer, who worked for seven hundred films, under composer, K. Chakravarthy, his mother Ghantasala Savitri is a playback singer and his aunt is singer P. Vasantha. Thaman is married to Play back singer Sri Vardhini.