Thuppakki ( transl. Gun) is a 2012 Indian Tamil-language action thriller film written and directed by AR Murugadoss. Produced by Kalaipuli S. Thanu of V Creations, the film stars Vijay, Kajal Aggarwal and Vidyut Jammwal with Sathyan, Jayaram, Manobala and Zakir Hussain in supporting roles. It revolves around Jagadish, an intelligence officer in the Indian Army, who seeks to track down, destroy and deactivate a sleeper cell, after witnessing and barely escaping a bombing carried out by the cell.

The project, which marked the beginning of a collaboration between Vijay and Murugadoss, was reported in July 2011, and the film's title was formally announced in December the same year. Principal photography commenced in January 2012 and ended that October. Filming mostly took place in Mumbai, except for two song sequences which were filmed in Bangkok and Switzerland respectively. The film's soundtrack was composed by Harris Jayaraj with cinematography handled primarily by Santosh Sivan and editing by A. Sreekar Prasad.

Thuppakki was released on 13 November 2012, Diwali day, and distributed by Gemini Film Circuit. The film went through numerous controversies, including protests from Islamic fringe groups who objected to the portrayal of the Islamic community in the film. Nevertheless, it received mostly positive reviews and became a major commercial success. A recipient of various accolades, the film received seven Filmfare Awards South nominations in the Tamil branch, but did not win in any category. In 2014, the film was remade in Hindi as Holiday: A Soldier Is Never Off Duty by the same director, and in Bengali as Game: He Plays to Win. Thuppakki was screened at the Moscow International Film Festival, Russia.