"Chachi 420" is a 1997 Indian comedy film directed by K. S. Ravikumar. The story revolves around a man named Naseeruddin Shah, who disguises himself as a woman to be close to his daughter and win her affection. The film explores themes of family, love, and the humorous situations that arise from his disguise. The movie features a mix of comedy and drama, showcasing the challenges faced by the protagonist in maintaining his secret. It also stars Raveena Tandon and Paresh Rawal, contributing to its entertaining narrative. "Chachi 420" is inspired by the Hollywood film "Mrs. Doubtfire."