Goldman’s script, originally called “The Sundance Kid and Butch Cassidy,” was purchased by 20th Century Fox for $400,000. The two starring roles were originally given to Newman and Steve McQueen, but McQueen left after failing to come to an agreement about which actor would receive top billing. Jack Lemmon’s production company JML had produced Cool Hand Luke in 1967. Paul Newman was grateful to Lemmon for his support, and offered him the Sundance Kid role, but Lemmon turned it down. He did not like riding horses, and he also felt he’d already played too many aspects of the Sundance Kid’s character before. Warren Beatty was considered for one of the lead roles, and Marlon Brando, who at the time had minimal box-office draw, was considered at one point due to his role in an earlier Western, One-Eyed Jacks. At one point, Steve McQueen and Paul Newman were expected to star, and they discussed using the new “staggered but equal billing” later introduced for The Towering Inferno. Eventually, Newman and Robert Redford were chosen, but initially Newman was to play Sundance and Redford Cassidy. 20th Century Fox did not want Redford to play the part, but director George Roy Hill insisted. Redford later noted that this film catapulted him to stardom and changed his career forever.
The movie was partially filmed near Durango, Colorado. (The area where they jump into the river is just north of Baker’s Bridge in SW Colorado.) In the scene where a railroad car is blown up, the railroad car was built for the scene out of balsa wood and toothpicks. The budget only allowed for one take, and therefore an unusually high amount of explosives was used. The explosion was huge, and the line “Think ya used enough dynamite there, Butch?” is reported to be an ad lib, according to locals who observed. (Screenwriter William Goldman included the line when he reprinted the script in his book Adventures in the Screen Trade.)
Butch Cassidy’s outlaw gang was actually called The Wild Bunch, this was changed in the film to The Hole In The Wall Gang to avoid confusion with Sam Peckinpah’s recently released film The Wild Bunch.
