THE CASTING:
Margot Robbie as Dr. Harleen Quinzel/Harley Quinn
Morena Baccarin as Selina Kyle/Catwoman (Batman Year One)
Jessica Chastain as Dr. Pamela Isley/Poison Ivy (New 52-Rebirth)
Halle Berry as Mari McCabe/Vixen
Adewale Akinnouye-Agbaje as Waylon Jones/Killer Croc
Jai Courtney as George Harkness/Captain Boomerang
Sophie Turner as Barbara Gordon/Batgirl
J. K. Simmons as Commissioner James Gordon
Adrianne Palicki as Barbara Ann Minerva/Cheetah
David Suchet as Oswald Cobblepot/The Penguin (main villian)
Michael C. Hall as Tommy Elliott/Hush (second in charge)
Michael Jai White as Eric Needham/Black Spider
Solomon Grundy (CGI + Animatronics)
NOTABLE CAMEOS:
Ben Affleck as Batman/Bruce Wayne
Jared Leto as the Joker