Girl's star Lena Dunham, Austin Butler, Maya Hawke, and Lorenza Izzo have all been added to the cast of Quentin Tarantino's Once Upon A Time In Hollywood.

Read more: See first look at Quentin Tarantino’s Charles Manson-inspired movie

In a new report by Variety, the Quentin Tarantino Charles Manson-inspired film has added four more names to its already star-studded cast.

Per the report, Dunham is set to play a character named Gypsy. Izzo is set to play a "glamorous Italian movie star" named Francesca Capucci and Hawke will be portraying a "flower child."

The film was scheduled to be released on Aug. 9, 2019, which also marked the 50th anniversary of the murders of Sharon Tate and her friends by Manson's followers, but has since been moved forward two weeks to July 26, 2019 to avoid possible controversy.

Information about the forthcoming film have been coming in ever so slowing, and here's what we know so far:

We recently found out that Al Pacino, Dakota Fanning, Luke Perry, Damian Lewis, Luke Perry, Emile Hirsch, Clifton Collins Jr, Keith Jefferson and Nicholas Hammond will also be taking part in the new movie in supporting roles.

Also joining the recently announced cast is Margot Robbie, who will play late actress Sharon Tate. In addition to Robbie’s casting, news broke that Burt Reynolds, Tim Roth, Kurt Russell and Michael Madsen have also been added to the ensemble.

All of these names will be joining the already announced Leonardo DiCaprio and Brad Pitt.

As previously reported, Pitt and DiCaprio are taking on the two lead roles. DiCaprio is set to play Rick Dalton, a former star of a western TV series, while Pitt will play Cliff Booth, who is Dalton’s longtime stunt double.

The two characters are “struggling to make it in a Hollywood they don’t recognize anymore. But Rick has a very famous next-door neighbor… Sharon Tate.”

We don’t have further details on just how DiCaprio and Pitt will be connected with Sharon Tate, but we do know that it is likely the murder of Tate and her friends will serve as a backdrop to the main story of the film, as reported by Variety.

At a recent appearance at CinemaCon in Las Vegas, the film's director, Quintin Tarantino shared that his Manson-themed film is “the closest to Pulp Fiction that I have done.”

Then, when asked about further information regarding the forthcoming film, we found that Tarantino has opted to keep the film's overall plot pretty quiet, saying:

“It's very hush-hush and top secret. But I can tell you that Once Upon a Time in Hollywood takes place in 1969, at the height of the counterculture hippie revolution and the height of new Hollywood. Street by street, block by block, we'll transform Los Angeles into the Hollywood of 1969.”

Manson, who died back in November of 2017, was the leader of the Manson Family, a murderous cult connected with the killing of actress Sharon Tate, who was pregnant at the time, and six others in Los Angeles July and August 1969.