Raavu Balasaraswathi Devi (born 28 August 1928) is an Indian singer and actress who performed from 1930 to the 1960s in Telugu and Tamil cinema. She was the first light music singer on All India Radio and the first playback singer in the Telugu cinema.^[1]

Balasaraswathi was born in Venkatagiri in 1928.^{[citation needed]} She learned music from Allathuru Subbayya and lent her voice for the first solo gramophone by HMV recording company at the age of six.^{[citation needed]}

She acted as child actor Ganga and also sang in the films Sati Anasuya and Bhakta Dhruva, both directed by C. Pullaiah in 1936.^[2] Observing her talent, director K. Subramaniam invited her to act in Tamil films. In the following years, she acted in Tamil films like Bhaktha Kuchela (1936), Balayogini (1937), and Thiruneelakantar (1939). She played the role of Tukaram's daughter in Tukaram (1938). The Tukaram role was portrayed by Musiri Subramania Iyer in the Tamil version and by C. S. R. Anjaneyulu in the Telugu version. In 1940, she acted with S. Rajeswara Rao in Illalu, directed by Gudavalli Ramabrahmam.

In Bhagya Lakshmi (1943) of Sri Renuka Films of V. Nagayya, she sang for Kamala Kotnis on screen, this being the first instance of playback singing in Telugu cinema.^{[citation needed]} The song Thinne Meedha Sinnoda was composed by Bhimavarapu Narasimha Rao.^{[citation needed]}

She lived for some years in Mysore, and then shifted to Hyderabad.^{[citation needed]} After her husband's death, she has lived with her son in her grandson's house in Secunderabad.^{[citation needed]}