Sushma Seth (born 20 June 1936) is an Indian stage, film and television actress. She started her career in the 1950s, and was a founder member of the Delhi-based theatre group Yatrik. Her first movie was Junoon in 1978. She is known for playing a mother and grandmother role in movies and on television, and notable for her role as Dadi in the pioneering TV soap Hum Log (1984–1985). She has worked with famous directors like Dev Raj Ankur, Ram Gopal Bajaj, Manish Joshi Bismil and Chander Shekhar Sharm. Brought up in Delhi, she is the elder sister of Manipuri dancer Charu Sija Mathur, the wife of Padma Shri awardee Rajkumar Singhajit Singh. She completed her schooling at Convent of Jesus and Mary, New Delhi. Thereafter she did a teachers training diploma in home science, Lady Irwin College, New Delhi, Associate in Science diploma, Briarcliff College, New York, and later, Bachelor of Fine Arts, from Carnegie Mellon, Pittsburgh, United States. Sushma Seth and her husband, businessman Dhruv Seth, have three children. Among them is actress Divya Seth, who acted alongside her mother in Hum Log and Dekh Bhai Dekh.

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