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 Sharma.