Hailing form a family of musicians, S. Mahathi is a child prodigy. Her father Sri. Thiruvaiyar P. Sekar, a Vocalist is a disciple of Padmavibhushan Dr. M. Balamurali Krishna. Her mother Smt. Vasanthi Sekar is a Flautist, is the grand disciple of Sri. T. R. Mahalingam, Sri. N. Ramani and Smt. Kesi. She is the great-granddaughter of the famous violinist “Sangeetha Kalanidhi” Pazhamaneri Swaminatha Iyer.
Mahathi, started identifying Classical Ragas at the tender age of 1 and a half years. This talent was identified by the parents during her father’s concert at a temple in Palakad. Her parents nurtured her talent by teaching her more and more Ragas. When she was 2 ½ years old she was able to identify about 75 Carnatic Ragas. In those days, just to test her talents, her father used to mix up Carnatic Swaras but Mahathi did not hesitate to identify the exact swaras of the Ragas.