Grandmaster is a 2012 Indian Malayalam-language action thriller film written and directed by B. Unnikrishnan and produced by Ronnie Screwvala and Siddharth Roy Kapur under the production company UTV Motion Pictures. The film stars Mohanlal as IG Chandrasekhar, a senior IPS officer who begins investigating a series of murders after receiving an anonymous note. The supporting characters are played by Priyamani, Narain, Anoop Menon, Babu Antony, Jagathy Sreekumar, and Arjun Nandhakumar.

Grandmaster was the debut Malayalam production of UTV Motion Pictures. The film was released on 3 May 2012 to widely positive reviews from critics and was a success at the box office. Grandmaster was released in the online video streaming service Netflix in the United States and Canada, making it the first ever Malayalam film to be released on Netflix. It was also the first Malayalam film to be released with English subtitles outside Kerala. The movie is based on the book The A.B.C Murders by Agatha Christie which was already adapted by Unnikrishnan for the script of a TV series named Black and White.