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.
Factual error: When Cliff is driving home on the freeway, just before he takes the off-ramp, a numbered exit sign is visible. California did not adopt numbered exits until 2002.






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.