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.

[2] The film stars Harry Myers as the titular Yankee Martin Cavendish.

After reading Twain's novel, Cavendish dreams that he, like Twain's protagonist Henry Morgan, is transported back to the time of King Arthur (Charles Clary), where he must use modern know-how to outwit the king's foes Morgan le Fay (Rosemary Theby) and Merlin (William V. Mong).

The screenplay modernizes the novel with many contemporary references, including mentions of Ford Model Ts, the Volstead Act, and the Battle of the Argonne Forest.

[3] The film is incomplete in the Library of Congress,[4] and only reels 2, 4 and 7 survive.