Everything we know about Quentin Tarantino's new movie, which stars Brad Pitt and Leonardo DiCaprio and involves the Manson Family murders

Tarantino said on Wednesday that he had been working on the script for the film for half a decade.

"I’ve been working on this script for five years, as well as living in Los Angeles County most of my life, including in 1969, when I was seven years old," he said. "I’m very excited to tell this story of an L.A. and a Hollywood that don't exist anymore. And I couldn't be happier about the dynamic teaming of DiCaprio & Pitt as Rick & Cliff.”

Deadline reported in January that the Leonardo DiCaprio would play an "aging actor" in a "'Pulp Fiction'-esque movie."

"Pulp Fiction," Tarantino's 1994 classic, told a collection of interconnected stories.

Deadline first reported in July that Tarantino had approached Margot Robbie about playing the actress Sharon Tate, who was murdered by the Manson Family.

"There has been a lot of press that the script focuses on Charles Manson and the murder spree he orchestrated, but I’m told that is akin to calling 'Inglourious Basterds' a movie about Adolf Hitler, when the Nazi leader was only in a scene or two," Deadline's Mike Fleming Jr. wrote in November of Robbie's potential role as Tate.

The Hollywood Reporter spoke with Robbie in January about the role: "Nothing's official," she said. "But I would kill to work with him."

Robbie was on the initial shortlist of cast members Tarantino had reportedly approached for the film, including Pitt and DiCaprio (the only official names announced), Samuel L. Jackson, Tom Cruise, and Jennifer Lawrence.

In November, Tarantino chose Sony as the distributor for "Once Upon a Time in Hollywood."

Deadline reported that Sony beat out a list of competitors, including Fox, Universal, Warner Bros., Lionsgate, and Annapurna, and that Tarantino was impressed with Sony head Tom Rothman's film knowledge.

Tarantino's previous films were released by Miramax and later The Weinstein Company. Both were companies of the film mogul Harvey Weinstein, who resigned from The Weinstein Company after bombshell reports accused him of sexual harassment and assault and assault in October.

Despite Tarantino's insistence that the film will not center on Charles Manson, "Once Upon a Time in Hollywood" is set for release on August 9, 2019, which is the 50th anniversary of the Manson Family murders.

The Hollywood Reporter first reported in December that the film's release was set to coincide with the anniversary of the Manson Family's killings of Sharon Tate and six other victims.