Irupatham Noottandu (transl. Twentieth Century) is a 1987 Indian Malayalam-language gangster film directed by K. Madhu, written by S. N. Swamy and produced by M. Mani. It stars Mohanlal, Suresh Gopi, and Ambika. The film's music was composed by Shyam. The plot follows Sagar Alias Jacky, a maverick youth who runs a gold smuggling racket for Sekharankutty, the son of the Chief Minister of Kerala. Their relationship stains after the latter brings narcotics into the business.

Irupatham Noottandu was released on 14 May 1987 enjoys a cult following in Malayalam cinema. It was remade in Kannada as Jackey (1989) and in Telugu as 20va Sathabdam (1990) with Suman and Ambareesh reprising Mohanlal's role in the Kannada and Telugu versions, while Devaraj portrayed Suresh Gopi's role in both versions. The film also reprised with characters has a titled Sagar Alias Jacky Reloaded, which is released in 2009 and directed by Amal Neerad with Mohanlal reprising his role.