Vidhi (transl. Fate) is a 1984 Indian Tamil-language legal drama film directed by K. Vijayan. A remake of the Telugu film Nyayam Kavali (1981), it stars Sujatha, Mohan, Poornima, and Jaishankar. The film revolves around a court case that Radha (Poornima) files against Raja (Mohan), concerning the legitimacy of her child conceived out of wedlock.

Principal photography began in December 1983 and was completed within two months. Vidhi was released on 26 January 1984. The film received positive reviews from critics, particularly for the dialogues in its courtroom scenes and was a commercial success, running for over 500 days in theatres.