We tried the court jester costume, we tried the corset and skirt, we tried leather pants, we tried literally every type of costume possible for her.
Costume designer Kate Hawley explains in Entertainment Weekly’s Comic-Con issue: “The jester suit has an amazing, powerful quality to it.
I cannot emphasis enough how many outfits, and how many variations of the Harley Quinn costume we tried.
However, at one stage, Robbie was set to wear Quinn’s classic jester outfit, yet the plans were scrapped by director David Ayer who took the character on a different path.