David Ayer Director, Screenwriter Will Smith Deadshot Actor Jared Leto The Joker Actor Margot Robbie Harley Quinn Actor Joel Kinnaman Rick Flag Actor Viola Davis Amanda Waller Actor Jai Courtney Boomerang Actor Jay Hernandez Diablo Actor Adewale Akinnuoye-Agbaje Killer Croc Actor Ike Barinholtz Griggs Actor Scott Eastwood Lieutenant GQ Edwards Actor Cara Delevingne June Moone, Enchantress Actor Adam Beach Slipknot Actor Karen Fukuhara Katana Actor Jim Parrack Frost Actor Aidan Devine Chairman Actor David Harbour Dexter Tolliver Actor Ezra Miller The Flash Actor Charles Roven Producer Richard Suckle Producer Zack Snyder Executive Producer Deborah Snyder Executive Producer Colin Wilson Executive Producer Geoff Johns Executive Producer Steven Mnuchin Executive Producer Roman Vasyanov Cinematographer John Gilroy Film Editing Steven Price Original Music Oliver Scholl Production Design Brad Ricker Supervising Art Direction Brandt Gordon Supervising Art Direction Peter Grundy Art Director Aleks Marinkovich Art Director Colin Woods Art Director Clint Wallace Art Director Eric Víquez Art Director Ravi Bansal Art Director Greg Berry Art Director Shane Vieau Set Decoration Kate Hawley Costume Design Mary Vernieu Casting Lindsay Graham Casting