How Green Was My Valley is a 1941 American drama film directed by John Ford, adapted by Philip Dunne from the 1939 novel of the same title by Richard Llewellyn. It stars Walter Pidgeon, Maureen O'Hara, Anna Lee, Donald Crisp, and a young Roddy McDowall.

John Martin Feeney, known professionally as John Ford, was an American film director and producer. He is regarded as one of the most important and influential filmmakers during the Golden Age of Hollywood, and was one of the first American directors to be recognized as an auteur. In a career of more than 50 years, he directed over 140 films between 1917 and 1965, and received six Academy Awards including a record four wins for Best Director for The Informer (1935), The Grapes of Wrath (1940), How Green Was My Valley (1941), and The Quiet Man (1952).