Margot Robbie

The 'Barbie' star played Harley Quinn in 2016's 'Suicide Squad' and reprised the role for ' Birds of Prey' in 2020 and claimed it had been the most "fun" job she had ever had. She said: "As well as it being fun, the almost infinite of possibilities makes it so easy to play a character like Harley, and I can safely say that I have never had so much fun or enjoyment either when I am reading the comics about her or when I am playing her in a role on screen. I love her."