"I pitched the idea of an 'R-rated' girl gang film including 'Harley', because I was like, 'Harley needs friends' Harley loves interacting with people, so don't ever make her do a standalone film," said Robbie.
"She’s got to be with other people, it should be a girl gang. I wasn't seeing enough girl gangs on screen, especially in the action space...
"And then of course having a female director to tell that story. And giving a female director the chance to do big budget stuff.
"They always get ‘Here’s the tiny little film’… I was like, ‘I love action.