Henry DeWitt Carey II was an American actor and one of silent film's earliest superstars, usually cast as a Western hero. One of his best known performances is as the president of the United States Senate in the drama film Mr. Smith Goes to Washington (1939), for which he was nominated for the Academy Award for Best Supporting Actor. He was the father of Harry Carey Jr., who was also a prominent actor.

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States senator who fights against government corruption, and was written by Sidney Buchman, based on Lewis R. Foster's unpublished story "The Gentleman from Montana".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.