Wikipedia
Sadma (; ) is a 1983 Indian drama movie directed by Balu Mahendra which stars Sridevi and Kamal Hassan in the lead with music composed by Ilaiyaraaja. The picture tells the story of Nehalata (Sridevi), a young woman who regresses to childhood after suffering a head injury in a car crash. Lost, she ends up trapped in a brothel before being rescued by Somu (Kamal Haasan), a lonely school teacher who falls in love with her.
The film is a remake of the 1982 of Balu Mahendra's own Tamil Film Moondram Pirai, starring Sridevi and Kamal Hassan. Sridevi's autistic child-woman performance was widely praised and is considered one of the finest performances and also brought her nominations in the Filmfare Best actress award category as well as State awards and National Awards. Kamal's performance in the film's climax won him the National Award in the Tamil original. The film flopped at the box-office,but as a film-it achieved cult status and is regarded as an all time classic featuring Kamal Haasan and Sridevi's best performances. Sridevi's role was initially offered to Dimple Kapadia, but she could not accept the role due to other commitments.