Leonardo DiCaprio shares first photo, in-costume with Brad Pitt, for Quentin Tarantino's upcoming 1969-set movie

• Leonardo DiCaprio on Wednesday shared the first on-set photo from Quentin Tarantino's upcoming movie, "Once Upon a Time in Hollywood."
• DiCaprio and Brad Pitt appear in the photo in-costume for the 1969-set film, which also stars Margot Robbie, Al Pacino, and Damian Lewis in a large ensemble cast. 
• "Once Upon a Time in Hollywood" is set for release on August 9, 2019.

Leonardo DiCaprio took to Instagram on Wednesday to share the first on-set photo from Quentin Tarantino's upcoming tenth movie, "Once Upon a Time in Hollywood." 

Brad Pitt and DiCaprio, the film's lead actors, appear in the photo in-costume for the 1969-set movie, which partly involves the Manson family murders of the actress Sharon Tate. 

DiCaprio stars in the film as Rick Dalton, a former star of a Western TV series, and Pitt plays Dalton's longtime stunt double, Cliff Booth. Margot Robbie stars in the movie as Sharon Tate, and the film features an impressive ensemble cast that includes Al Pacino, Damian Lewis, Dakota Fanning, Burt Reynolds, and an extensive list of other actors.

Tarantino announced the film in February, calling it "a story that takes place in Los Angeles in 1969, at the height of hippy Hollywood." DiCaprio and Pitt's 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," Tarantino said. 

Leonardo DiCaprio, who starred as a villainous slave owner in Tarantino's Oscar-winning 2012 film "Django Unchained," had high praise for Tarantino's latest script at CinemaCon in April.

"It's hard to speak about a film that we haven't done yet, but I'm incredibly excited ... to work with Brad Pitt, and I think he's going to transport us," DiCaprio said. "I'm a huge fan of 'Singin' in the Rain' - movies about Hollywood. As an LA native, having read the script, it's one of the most amazing screenplays. We are going to do our best job to make it fantastic."

"Once Upon a Time in Hollywood" is set for release on August 9, 2019, the 50th anniversary of the Manson family murders. 

Below are several Twitter posts from fans reacting to DiCaprio's "first look" photo on Wednesday: