Quentin Taratino's upcoming "Once Upon a Time in Hollywood" is set on 1969 around the time of the notorious 1969 Manson Family murders -- and features a mix of both real-life and fictional characters.
Leonardo DiCaprio and Brad Pitt, for instance, play a (fictitious) washed-up Western actor and his stunt double who are neighbors of actress (and true-life murder victim) Sharon Tate. Here's how the cast -- as we know it so far -- matches up with their real-life counterparts.
Margot Robbie ("I, Tonya") plays actress Sharon Tate, who was eight and a half months pregnant when she was murdered by the Charles Manson Family. (Her husband, director Roman Polanski, was in Europe shooting a movie at the time.)
Australian actor Damon Herriman ("Justified") will play the notorious Charles Manson.
Burt Reynolds plays George Spahn, the aged California rancher who was persuaded to allow the Manson Family to live on his property.
Dakota Fanning ("The Alienist") portrays Lynette "Squeaky" Fromme, a Charles Manson disciple who later attempted to assassinate President Gerald Ford.
Damian Lewis ("Billions") as actor Steve McQueen.
Emile Hirsch ("Into the Wild") plays celebrity hair stylist and Manson Family murder victim Jay Sebring (né Thomas Kummer).
Polish actor Rafal Zawierucha ("Warsaw 44") will play the young Roman Polanski, who was filming a movie in Europe when his pregnant wife, Sharon Tate was killed.
"Empire" and "Inhumans" actor Mike Moh plays kung-fu master Bruce Lee, whom Roman Polanski briefly suspected in the 1969 murder of his wife, Sharon Tate.
Austin Butler ("The Carrie Diaries," "The Shanarra Chronicles") plays Charles "Tex" Watson, a central member of Manson's Family who committed multiple murders and was later convicted on seven counts of first-degree murder
Lena Dunham ("Girls") portrays Catherine "Gypsy" Share, a follower of Manson who did not participate in the Sharon Tate murders.
Rumer Willis ("Empire") plays Joanna Pettet, a British actress who appeared in movies like "The Group" -- and who also lunched with Sharon Tate hours the day of her murder.
Nicholas Hammond, who played Friedrich in "The Sound of Music," plays actor-director Sam Wanamaker (whose connection to the Manson case is unclear).
Popular 1960s actress and singer Connie Stevens will be played by "Don't Trust the B--- in Apartment 23" alum Dreama Walker.
Voytek Frykowski (a.k.a. Wojciech Frykowski), the Polish actor who was killed along with others in Roman Polanski's home on L.A.'s Cielo Drive, will be played by Russian-born actor Costa Ronin ("The Americans").
Abigail Folger, a Manson Family victim who was heiress to the Folger coffee fortune and girlfriend of Frykowski, will be played by "The Love Witch" actress Samantha Robinson.
"The Leftovers" star Margaret Qualley plays Kitty Kat, based on Manson Family member Kathryn "Kitty" Lutesinger, the girlfriend of convicted murderer Bobby Beausoleil.
Madisen Beaty ("The Fosters," "Aquarius") appears as Katie, the nickname for Manson Family member Patricia Krenwinkel, who was convicted of murder for her role in the slaying of Sharon Tate and four others on Cielo Drive.
Newcomer Victoria Pedretti plays Lulu, the nickname for Manson Family member and convicted murderer Leslie Van Houten -- who was 19 at the time of the slayings.