The Gay Lord Quex is an 1899 comedy play by the British playwright Arthur Wing Pinero. A newly engaged aristocrat tries to demonstrate his fidelity to his fiancée while one of his friends tries to urge him to be unfaithful.
The play was adapted into twice into silent films—a British one in 1917, directed by Maurice Elvey, and an American one in 1919, directed by Harry Beaumont.