Margot Robbie Image Credit: Instagram

Margot Robbie might make you do a double take after seeing a photo she posted on Monday on Instagram, featuring herself in costume as the late Sharon Tate.

The shot is a “first look” for the upcoming Quentin Tarantino film Once Upon a Time in Hollywood, and Robbie is spot-on as the actress.

In the post, Robbie wears a black turtleneck, white skirt and matching gogo boots that tie the outfit together in classic late-60s fashion.

The movie, which is still in early stages of production, centres on actor Rick Dalton (Leonardo DiCaprio) and his trusted stunt double Cliff Booth (Brad Pitt), who are trying to make it in Hollywood circa 1969. It also stars Tim Roth, Dakota Fanning, Al Pacino, Kurt Russell and James Marsden.

Robbie is playing Tate — an actress and the very pregnant wife of director Roman Polanski — who was brutally murdered at her home with four others by Charles Manson’s cult followers the year the film takes place.

Sharon Tate’s sister Debra Tate tweeting her feelings August 3 about the film, which touches on the murder of Sharon at age 26. Debra, who is a victim’s advocate and author of Sharon Tate: Recollection, was allowed to read the script and heard the vision of the film from Tarantino himself.

“I have to protect my sisters legacy and to do what I can to make sure her memory is not exploited,” Debra wrote. “I’m proud to fully support his [Tarantino’s] film.”

Once Upon a Time in Hollywood is set to hit US theatres on July 26, 2019.