Duck, You Sucker! is a 1971 Italian epic buddy Zapata Western film directed and co-written by Sergio Leone. The film stars Rod Steiger, James Coburn and Romolo Valli.
Set during the Mexico Revolution of the 1910s, the film tells the story of Juan Miranda, an amoral Mexican outlaw, and John Mallory, an ex-Irish Republican revolutionary. After they accidentally meet under less-than-friendly circumstances, Juan and John involuntarily become heroes of the Revolution despite being forced to make heavy sacrifices.
It is the second film of what is sometimes referred to as Leone's Once Upon a Time Trilogy, which includes the previous Once Upon a Time in the West and the subsequent Once Upon a Time in America, released thirteen years later. The last western film directed by Leone, it is considered by some to be one of his most overlooked films.