Nenjathai Killathe is a 1980 Indian Tamil-language romantic drama film written and directed by Mahendran. The film stars Suhasini, Sarath Babu, Pratap and Mohan. It focuses on a girl who is torn between the man she loved, and the man she married.

J. Alexander, known professionally as Mahendran, was an Indian film director, screenwriter and actor, known for his work in the Tamil film industry. Mahendran is regarded as one of the greatest film makers of Tamil cinema and has influenced several filmmakers of the generations that followed.