At one point, George Lucas had planned the character of Han Solo to be a huge green-skinned monster with no nose and gills. Then Lucas changed the idea of Han Solo to a black human. He auditioned several black actors and even musicians (including Billy Dee Williams) until finally settling on Glynn Turman. But after this he decided to make the role white and went withHarrison Ford.
At one point, George Lucas planned for the characters of Luke Skywalker and his aunt and uncle, to be dwarves.
Luke went through several changes. Lucas toyed with the idea of changing him into a woman after cutting Princess Leia from the script. He also entertained the notion of casting the principal characters as a dwarfs. In an early screenplay, Skywalker was a 60 year-old general. In the shooting script, he was called Luke Starkiller but this was changed to Luke Skywalker during production.