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In an Instagram post captioned 'first look', she showed off an image of herself in a black turtleneck, white skirt and white go-go boots. And if anyone was in any doubt, she added the hashtag 'OnceUponATimeInHollywood', as well as tagging the film's official Instagram page.
The film, which is due for release in 2019, is centred around the 'Manson Family' murders of 1969.
Sharon Tate was an American model and actor who was married to director Roman Polanski, and was eight-and-a-half-months pregnant with their son when she was brutally murdered alongside four others in her LA home by the Manson Family.
Polanski had not been home at the time as he was away working on a movie in Europe.
The Manson Family were a cult who lived in a commune on a California ranch, and committed a series of murders in the summer of 1969 at the command of their leader, Charles Manson - an ex-convict and aspiring musician.
Manson, who died in prison aged 83 last year, believed in the 'Helter Skelter', a name taken from a Beatles song which he used to define an impending and world-ending race war. He believed the murders he was ordering would help to start it off.
Once Upon a Time in Hollywood will clearly be another bloody Tarantino spectacle - and another featuring an all-star cast.
Leonardo DiCaprio shared his own first look post with co-star Brad Pitt in June.
DiCaprio will star as Rick Dalton, a struggling actor who is neighbours with Sharon Tate, while Pitt plays Dalton's long-time stunt double and close friend and Al Pacino plays his agent. Damian Lewis and Burt Reynolds also have starring roles.
Harvey and Bob Weinstein were to be involved in the film's production, but following last year's sex abuse scandal Tarantino cut ties with the Weinstein Company who he had worked with throughout his entire career.
The film will wrap later this year and is due to be released on 26 July next year, having originally been scheduled for 9 August to coincide with the 50th anniversary of the murders committed by Manson and his followers.
Featured Image Credit: PA
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