Roman Polanski not only directed Rosemary's Baby, but he also adapted the screenplay from the Ira Levin novel of the same name. Most consider this film to be one of the greatest Horror classics ever made. Paramount Executive Robert Evans had a vision to produce Rosemary's Baby and played a big part in putting it all together by casting the right actors. The Actors Room delves into what it took to make this wonderful and creepy film.