Maattrraan (transl. Alternate) is a 2012 Indian Tamil-language action thriller film directed by K. V. Anand, who co-wrote the script with Subha, and produced by AGS Entertainment. The film stars Suriya in dual roles as a conjoined twin brothers, along with Kajal Aggarwal in the female lead. It also stars an ensemble supporting cast. The film features music composed by Harris Jayaraj, cinematography handled by Soundararajan, editing done by Anthony, respectively. V. Srinivas Mohan, handled the visual effects.

The film was launched on 22 July 2011, along with the commencement of principal photography. A major portion of the film was shot in the Balkan region in countries like Croatia, Serbia, Albania and Macedonia, as well as Latvia and other parts of Europe, with rest of the scenes in India. Maattrraan was the first Indian film to use performance capture technology. Based on the conjoined twins concept, It was also touted to be the first Indian film based on conjoined twins, until two other films, with the same concept were launched later. The film was released on 12 October 2012 to positive reviews from critics.