Leonardo DiCaprio and Brad Pitt Join Cast of Quentin Tarantino Film 'Once Upon a Time in Hollywood' According to E! News, Tarantino gave a brief description of the film's plot: That's right, the film will take place during Charle Manson's 1969 murder spree. As for Sharon Tate's character, reports claimed Tarantino asked Margot Robbie to sign on to the project. Once Upon a Time in Hollywood is set to be released Aug. 9, 2019.