Well, it seems this big sis wasn't having any of it!
Koko took to Twitter on Monday with a very cryptic message about all the "sh*t", writing:
[Image via Instagram.]
This movie is looking more and more innneresting!
We'd heard that Cara Delevingne was up for the role of fan favorite Harley Quinn, but according to Collider, the part of Joker's sometime girlfriend has been gobbled up by the Wolf Of Wall Street star!
Harley, one of the only Batman characters to jump from the 90s cartoon to the comics, will be a tricky part for any actress to play.
Because the role originated onscreen, fans will expect her iconic voice to go along with her signature two-tone look.
And besides her skills in acrobatics and martial arts, the Joker's clown-obsessed gal Friday is also certifiably insane!
Good thing Margot is a talented enough actress to pull it off!