Our American Cousin is a three-act play by English playwright Tom Taylor. It is a farce featuring awkward, boorish American Asa Trenchard, who is introduced to his aristocratic English relatives when he goes to England to claim the family estate. The play premiered with great success at Laura Keene's Theatre in New York City in 1858, with Laura Keene in the cast, the title character played by Joseph Jefferson, and Edward Askew Sothern playing Lord Dundreary. The play's long-running London production in 1861 was also successful.
The play quickly rose to great renown during its first few years and remained very popular throughout the second half of the 19th century. Despite achieving critical and audience acclaim throughout its production history, Our American Cousin is best known as the play that U.S. president Abraham Lincoln was attending in Ford's Theatre in Washington, D.C. when he was assassinated by John Wilkes Booth, a Confederate sympathizer who attempted to time the sound of his gunshot with the audience's laughter on a particularly famous line.