Ghantasala Sai Srinivas Thaman Siva Kumar (born November 16, 1983), known professionally as S. Thaman, is an Indian film score composer, playback singer, and drummer who works predominantly in Telugu and Tamil cinema. After early work as an apprentice rhythm player under M. M. Keeravani and a supporting role as an actor in the coming-of-age musical Boys (2003), he debuted as an independent feature composer with the action comedy Kick (2009) and the Tamil thriller Eeram (2009).
Through the 2010s, Thaman composed soundtracks and background scores for commercial action features, including Brindavanam (2010), Dookudu (2011), Businessman (2012), Race Gurram (2014), and Sarrainodu (2016). For the action drama Ala Vaikunthapurramuloo (2020), he won the National Film Award for Best Music Direction. His subsequent scoring credits include the period drama Akhanda (2021), the bilingual family drama Varisu (2023), Guntur Kaaram (2024), Game Changer (2025), and The Rajasaab (2026).
