Once upon a time on the French Riviera ...

Despite an apparent dearth of lines in Once Upon a Time in Hollywood, Margot Robbie is doing everything she can to honor the memory of onscreen counterpart Sharon Tate.

The actress arrived at a photocall in Cannes on Wednesday in a delicate white off-the-shoulder maxidress and silver Tamara Mellon sandals, but it was her unassuming hairstyle that really caught our attention.

"Once Upon A Time In Hollywood" Photocall - The 72nd Annual Cannes Film Festival
Credit: Daniele Venturelli/Getty Images

The Oscar nominee wore her blonde locks straight and parted down the center with two small, loose braids framing her face on each side.

"Once Upon A Time In Hollywood" Photocall - The 72nd Annual Cannes Film Festival
Credit: Tony Barson/Getty Images

If the braided look seems retro to you, you’re not wrong — in fact, it’s near identical to the style Tate wore to that very festival in 1968, which she attended with husband Roman Polanski.

Sharon Tate and Roman Polanski. Cannes festival, 1
Credit: NOA/Getty Images
Margot Robbie and Sharon Tate
Credit: Getty (2)

Hollywood, already a critical darling, lost a bit of its shine during its Cannes press conference when director Quentin Tarantino declined to comment on Robbie’s few lines in the film. Margot stepped in after Tarantino tersely refused a reporter’s question on the matter, explaining, “I always look into the character, and what the character is supposed to serve. I think the moments that I got on screen gave an opportunity to honor Sharon. I think the tragedy was ultimately the loss of innocence and to really show those wonderful sides of her, I think could be adequately done without speaking."

Tate was the most famous victim of the Manson murders, which shocked the nation as they swept across Hollywood in the summer of 1969. She was nearly nine months pregnant at the time of her death.