Factual error: Sharon Tate walks past a theater sign that shows the film Pendulum is playing. This movie is set in February of 1969, but that movie did not come out in the US until March of 1969.
Once Upon a Time in Hollywood (2019)
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Directed by: Quentin Tarantino
Starring: Brad Pitt, Leonardo DiCaprio, Timothy Olyphant, Margot Robbie, Austin Butler, Maya Hawke, Sydney Sweeney
Other mistake: Cliff's dog is referred to as female but when it jumps up at a door towards the end of the film, it is male.
Bruce Lee: My hands are registered as lethal weapons. We get into a fight, I accidentally kill you? I go to jail.
Cliff Booth: Anybody accidentally kills anybody in a fight, they go to jail. It's called manslaughter.
More trivia for Once Upon a Time in Hollywood
Question: Was it intentional that Joe Namath and Ann Margaret's names were each repeated twice on the screen as Sharon Tate walked into the theatre? (01:08:00)
Answer: Yes, though the intention was not Tarantino's. What is onscreen is the trailer of the (real) 1970 film "C.C. and Company", which starred (as you might have guessed) Joe Namath and Ann-Margret. Said trailer showed their names twice, a stylistic choice that emphasized the film's stars, and Tarantino used the unaltered trailer in the film.