The Revenant is an upcoming western thriller film produced and directed by Alejandro G. Iñárritu. The screenplay, adapted from Michael Punke's 2003 novel of the same name, was written by Iñárritu and Mark L. Smith and is partially based in the life of frontiersman Hugh Glass. The film is set to star Leonardo DiCaprio, Tom Hardy, Will Poulter, and Domhnall Gleeson. Development of the film began on August 2001 when Akiva Goldsman purchased Punke's manuscript with the intent of producing the film. The film was originally set to be directed by Park Chan-wook with Samuel L. Jackson in mind to star, and later by John Hillcoat with Christian Bale in negotiations to star. Both directors left the project, and González Iñárritu signed on to direct in August 2011. In April 2014, after several delays in production due to other projects, González Iñárritu confirmed that he was beginning work on The Revenant and that DiCaprio would play the lead role. Principal photography began in October 2014.