Many of the most famous, memorable, or iconic movies owe some if not all the credit to the actors and actresses who were cast in the film. But what if a movie like The Matrix, or Terminator had someone else as the lead character? Would the film have been as or at all successful? Could it have been even better or more universally loved? We may never know the answer to that question unless we figure out how to travel to alternate realities. Check out this list of classic and famous films that originally had different actors or actresses in mind for the leading roles.