A Connecticut Yankee in King Arthur's Court is a 1921 American silent film adaptation of Mark Twain's 1889 novel A Connecticut Yankee in King Arthur's Court. The film was produced by the Fox Film Corporation and directed by Emmett J. Flynn based on a screenplay by Bernard McConville. It is notable as the first film adaptation of Twain's novel and as the second film about time travel to the past.

A Connecticut Yankee in King Arthur's Court is an 1889 novel by American humorist and writer Mark Twain. The book was originally titled A Yankee in King Arthur's Court. Some early editions are titled A Yankee at the Court of King Arthur.