Uncle Bun is a 1991 Indian Malayalam-language film written and directed by Bhadran, and starring Mohanlal in the title role, as an obese youngster and Charmila in lead roles. The film is a remake of the 1989 film Uncle Buck and also the official Malayalam debut of Tamil actress, Khushbu Sundar, as second female lead role, after Charmila.

Special costumes were designed for Mohanlal, for his obese look by art director Sabu Cyril. The film included a lot of special effects sequences including a shot featuring a 360-degree head-turn. A. Vincent and Jayanan Vincent were hired for the special effects photography, as there were no computer-generated graphics during the time.