Margot Robbie has been rumored to be associated with the upcoming film Suicide Squad for a while now, but on Tuesday, Warner Bros. officially announced her part in the film, along with several other actors.

Robbie–who stole scenes in The Wolf Of Wall Street–will be playing the part of Harley Quinn, who first made an appearance on Batman: The Animated Series as a doctor who tries to make headway with the Joker. Also announced were Will Smith as Deadshot, Tom Hardy as Rick Flagg, and Jared Leto as the Joker. Zack Snyder, who directed 300 and Man Of Steel, will be executive producing the film.

“She’s another one of the Joker’s sick jokes since she was a psychiatrist at Arkham Asylum (her real name is “Harleen Quinzel”) who tried analyzing the Joker, and he psychologically manipulated her into being infatuated with him,” Matt Goldberg of The Collider writes. “The best Harley Quinn stories have managed to balance both the tragedy of her situation with the character’s lighthearted nature.”

.@iWillSmith, Tom Hardy, @JaredLeto, @MargotRobbie, @CaraDelevingne to star in #SuicideSquad http://t.co/pLZ5Pc3Ve6 pic.twitter.com/GXAM2Kk6BG

— TheWrap (@TheWrap) December 2, 2014

“The Warner Bros. roots are deep on this one. David Ayer returns to the studio where he wrote Training Day and brings his incredible ability to craft multidimensional villains to this iconic DC property with a cast of longtime Warner collaborators Will Smith and Tom Hardy, and other new and returning favorites: Margot, Jared, Jai and Cara,” Silverman continued. “We look forward to seeing this terrific ensemble, under Ayer’s amazing guidance, give new meaning to what it means to be a villain and what it means to be a hero,” said WB president of creative development Greg Silverman.