VIDEO : All The Fine Details Of Tarantino's 'Once Upon a Time in Hollywood'

Isaac Brekken/Getty Images Quentin Tarantino announced earlier this year that Brad Pitt and Leonardo DiCaprio would be starring in his upcoming ninth film, "Once Upon a Time in Hollywood," which partly involves the Manson Family murders. In April, Tarantino and DiCaprio teased a few details about the film at the Las Vegas industry event CinemaCon, and Margot Robbie confirmed to IndieWire that she was playing the role of actor Sharon Tate in the film. Since then, a strong supporting cast has steadily filled in. A source close to the production told IndieWire last month that Damian Lewis, Dakota Fanning, and Emile Hirsch will appear in the film.