Robbie would reunite with her co-star from `Once Upon a Time...in Hollywood` Brad Pitt on the film, who remains attached as the film is still moving forward. Paramount currently has the film slated for a Christmas Day release in 2021, but the film was meant to shoot in Los Angeles prior to the COVID-19 pandemic so it's unclear whether that date will hold.

While plot details are still being kept under wraps, the film is reportedly a period drama set in the late 1920s and early '30s in Hollywood at the turn in the movie industry between silents and talkies.

`Babylon` will be produced by Olivia Hamilton, Matt Plouffe, Marc Platt and Tobey Maguire. `Babylon` is Chazelle's follow-up to his feature `First Man,` which starred Ryan Gosling in a biopic about the first man on the moon Neil Armstrong.

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Robbie is keeping busy after starring in both `Once Upon a Time...in Hollywood` and `Bombshell` from last year. This year she appeared in `Birds of Prey` and produced `Promising Young Woman` with Carey Mulligan. She's also attached to star in David O. Russell's next film, in the new `The Suicide Squad` from director James Gunn and the live-action `Barbie` film.