According to producers, the ideas was to create a sequel to Bullitt, but McQueen turned it down because he "did not do sequels." Subsequently, the script was retolled for Eastwood.

Turned down the lead role, calling it a movie "he would not do for any amount."

Audie Murphy was offered the role of Scorpio but died in a plane crash before filming began.

Newman was considered to play the lead role of Harry.

Frank Sinatra turned down the lead role.

John Wayne turned down the lead role.