In Harihar Nagar is a 1990 Malayalam comedy film written and directed by the duo Siddique-Lal. It stars Mukesh, Siddique, Jagadish and Ashokan in major roles. The film became one of the biggest hits in Malayalam film history and has a dedicated cult following. It is referred to as part of the golden age of Malayalam comedy and among the most hilarious movies in Indian cinema.
The film has spawned two sequels, 2 Harihar Nagar (2009) and In Ghost House Inn (2010), both written and directed by Lal from the duo. The film was remade into Hindi, Telugu and Tamil by different film makers.