Sharon Tate is about to be resurrected in spectacular fashion in Quentin Tarantino's new movie, thanks to Margot Robbie ... so says Sharon's sister, who watched the action on the closed set.
Debra Tate says QT's flick "Once Upon a Time in Hollywood" -- which centers around the murders of her sibling and her friends at the hands of the Manson Family -- is magnificent because Margot is capturing all the nuances from the slain actress.
**** - Oscar - Pitch - Debra - Margot
It's a **** of an Oscar pitch. Debra says Margot's taking the role incredibly seriously ... and...