Robbie was spotted shopping for baby clothes in London with her hubby in October 2021.
Production is reportedly due to kick off next year, heading towards a theatrical release in 2023.
According to director Gunn, Robbie is a 'human Swiss army knife'
Even though Hollywood is no stranger to lookalikes - the pair have seem to have a bit more in common than others.
The actress went to extreme lengths to secure her part in the movie
The new movie sees Margot Robbie reprise her role as the dastardly Harley Quinn
"I've done my superhero. Killed it."
Quentin Tarantino told the New York Times reporter: "I reject your hypothesis"
The trailer for the Quentin Tarantino's ninth film has finally dropped
Is the proof in the picture?
It features Harley Quinn dancing around in a multi-coloured coat intercut with brief glimpses of other characters
The Aussie actress says she feels 'honoured' to take on the iconic role
“It’s just a very weird thing and you have to bury the embarrassment and absurdity, really deep, and fully commit”
The film, which is due for release in July next year, is centred around the Manson 'family' murders of 1969
There's no word on when this film will hit our screens but it sounds epic
She'll apparently be joining Leonardo DiCaprio and Brad Pitt for Tarantino's forthcoming ensemble flick
The award went Frances McDormand for her role in 'Three Billboards Outside Ebbing, Missouri'
Margot Robbie, who was nominated for Best Actress for her role in 'I, Tonya', took her mum with her to the 90th Academy Awards
The I, Tonya star puts her palette to the test by tasting classic British and American snacks, before giving her verdict on which is best.
Well, no, obviously not, but you couldn't be blamed for getting them mixed up
It may not be a real film, but that doesn't mean it's not entertaining and now even more big name cast members have been announced.