I can't see any human playing any of the charators from any of the books. Each of the Guards or Witches or any of the people are beings unto themselfs. Yes, Lord of the Rings had humans but they were not the most important. I don't like the idea of some actor being Vimes or Carrot and then in the next movie some one else being them. I have the cartoon version of one of the books and thats fun because they could stay whit the book terry wrote. Whit humans they would have to change to many things for the storys to makes sense. I really don't want any one to mess with any of Terrys books, they are perfect just the way they are.