Kalyani is a 1952 Indian Tamil-language psychological drama film directed by Acharya and M. Masthan, and produced by T. R. Sundaram of Modern Theatres. The film portrays the life of a mentally-deranged man and is heavily inspired by 1948 American film The Snake Pit. It was later remade in Telugu as Atthainti Kaapuram in 1952. Kalyani stars M. N. Nambiar. B. S. Saroja, D. Balasubramaniam, M. G. Chakrapani and T. P. Muthulakshmi had supporting roles.

Manjeri Narayanan Nambiar was an Indian actor who worked predominantly in Tamil cinema, known mostly for his villain roles in an eight decade long career. He has also appeared in a few Malayalam films.