Who played Norma Desmond in 'Sunset Boulevard'?

Who played Rhett Butler in 'Gone with the Wind'? Who played Dorothy Gale in 'The Wizard of Oz'? In which film is Rick Blaine a character? In which film is Ilsa Lund a character? In which film is Norma Desmond a character? In which film is Norman Bates a character? Who played Maria von Trapp in 'The Sound of Music'? In which film is Maria von Trapp a character?