Neetu Singh made her debut as a child actress with the film "Suraj" in 1966, with Rajendra Kumar and Vyjanthimala as the lead pair. She was spotted by actress Vyjanthimala in her dance school, who suggested to T. Prakash Rao that Neetu be taken for the small uncredited role in the film "Suraj". She starred as the child artiste in films such as "Dus Lakh", "Waris", "Pavitra Paapi" and "Ghar Ghar Ki Kahani". She appeared in a role originally played by Kutty Padmini in "Kuzhandaiyum Deivamum", in its Hindi remake "Do Kaliyaan".