Joker/Main Character- Looks like Heath Ledger Joker.

Harley Quinn- Mix between Margot Robbie and Harley Quinn TV show version of herself.

Bruce Wayne/Batman- Christian Bale

Alfred Pennyworth- Michael Caine

Superman/Clark Kent- Henry Cavill

The Flash/Barry Allen- Grant Gustin

Wonder Woman/Diana of Themyscira- Gal Gadot

Penguin/Oswald Cobblepot- Robin Lord Taylor

The Riddler/Edward Nigma/Nygma- Cory Michael Smith

Jim/James Gordon- Ben Mckenzie

Selina Kyle/Catwoman- Anne Hathaway

Lex Luthor- Michael Rosenbaum

Carmine Falcone- John Doman

Salvatore Maroni- David Zayas

Ra's al Ghul- Matthew Nable