original: The list is sorted by film and character, as some characters have been portrayed by multiple actors.
simplifications: The list is sorted by movie and character because some characters have been portrayed by multiple actors. The list is sorted because some characters have been played by many actors. Some characters have been portrayed by multiple actors. The list is sorted by film and character. The list is sorted by film and character. This is because some characters have been played by more than one actor. The list is sorted by film and character. Mome characters have been played by more than one actor. The list is arranged  by film and character, some characters have been played by multiple actors. The list is sorted by film and character since some characters have been played by more than one actor. The list is sorted by film and character. This is because multiple actors sometimes have portrayed the same character. The cast had some characters that were portrayed by multiple actors. The list is grouped by film/character, as some roles have been played by many actors.