Mr. Smith Goes to Washington is a 1939 American political comedy-drama film directed by Frank Capra, starring Jean Arthur and James Stewart, and featuring Claude Rains and Edward Arnold. The film is about a naive, newly appointed United States senator who fights against government corruption, and was written by Sidney Buchman, based on Lewis R. Foster's unpublished story "The Gentleman from Montana". The film was controversial when it was first released, but successful at the box office, and it made Stewart a major star. It was also loosely based on the life of Montana U.S. Senator Burton Wheeler, who underwent a similar experience when he was investigating the Warren Harding administration.

Frank Russell Capra was an Italian-born American film director, producer, and screenwriter who was the creative force behind some of the major award-winning films of the 1930s and 1940s. Born in Italy and raised in Los Angeles from the age of five, his rags-to-riches story has led film historians such as Ian Freer to consider him the "American Dream personified".