True Grit is a 1969 American Western film directed by Henry Hathaway and produced by Hal B. Wallis. Starring John Wayne as U.S. Marshal Rooster Cogburn, with Glen Campbell and Kim Darby, the film is adapted by Marguerite Roberts from Charles Portis' 1968 novel of the same name.

The story follows Marshal Cogburn and Texas Ranger La Boeuf (Campbell) as they are hired by a young girl, Mattie Ross (Darby), to apprehend the outlaw who killed her father. Historians believe Cogburn was based on Deputy U.S. Marshal Henry "Heck" Thomas, who brought in some of the toughest outlaws. The cast also features Robert Duvall, Dennis Hopper, Jeff Corey and Strother Martin.

The film was released by Paramount Pictures on June 13, 1969. It received positive reviews from critics, who drew particular praise to Wayne's performance, and was a commercial success. Wayne won the Academy Award for Best Actor and the Golden Globe Award for Best Actor in a Motion Picture – Drama, his only competitive win for either institution. The film also received an Oscar nomination for Best Original Song, and Darby received a BAFTA Award nomination for Most Promising Newcomer.

True Grit's success spawned a 1975 theatrical film sequel with Wayne (Rooster Cogburn), a 1978 made-for-TV sequel starring Warren Oates (True Grit: A Further Adventure), and an acclaimed 2010 remake film of the same name by the Coen brothers.