M.S. Sundari Bai more commonly known as Sundari Bai is an Indian cinema film actress and dancer. She worked mainly in Tamil cinema. The song "Naatiya Kudhirai Naatiya Kudhirai Naalaayiram Pon Vangalaiyo," was performed by her. And it was inspired by music movie "Coney Island" starring Bette Grable- the pin-up girl of that era.

She was born in Madurai and belonged to Saurashtra community. Her beautiful eyes and looks made one of her family members to recommend her to go to Mumbai to find opportunities as an actor. In her first role, she appeared in an ad-film in early 1930's. She appeared in "Madanakamarajan" of Gemini studio's first production in 1941. Her movies like Dasi Aparanji and Nandanar took her to a great new level. She got married to Kothamangalam Subbu, the love of her life, who was also a member of Gemini Studio.

He was an actor, director, and writer. She played the lead actress in "Kannamma En Kaathali," a patriotic film. Kothamangalam Subbu wrote the screenplay, story, dialogue and lyrics of the film. Sundari Bai acted in many famous movies including "Valliyin Selvan," "Enga Veettu Mahalakshmi," "Moondru Pillaigal," "Deiva Piravi," "Naan Kanda Sorgam," "Padikkaatha Methai," "Avvaiyar," "Vanji Kottai Vaaliban," "Paadhai Theriyuthu Paar" and "Sila Nerangalil Sila Manithargal." She, later on, became a freelance artist. She died in 2006.