Tom Cruise Jerry Maguire (archive footage) (uncredited)
Ralph Fiennes Alfred Pennyworth (voice)
Jonah Hill Green Lantern (voice)
Seth Green King Kong (voice)
Channing Tatum Superman (voice)
Zoë Kravitz Catwoman (voice)
Zach Galifianakis Joker (voice)
Jason Mantzoukas Scarecrow (voice)
Jenny Slate Harley Quinn (voice)
Will Arnett Batman / Bruce Wayne (voice)
Jamie Chung Animation
Michael Cera Robin / Dick Grayson (voice)
Rosario Dawson Batgirl / Barbara Gordon (voice)
Chuck Dixon Thanks
Mariah Carey Mayor McCaskill (voice)
Susan Bennett 'Puter (voice)
Kate Micucci Clayface (voice)
Chris McKenna Screenplay
Héctor Elizondo Jim Gordon (voice)
Jemaine Clement Sauron (voice)
Riki Lindhome Poison Ivy (voice)
Conan O'Brien The Riddler (voice)
Ellie Kemper Phyllis (voice)
John Requa Creative Consultant
Max Aruj Music Score Producer
Billy Dee Williams Two-Face (voice)
Jerry Siegel Characters
Benjamin Melniker Executive Producer
Jerry Robinson Thanks
Bruce Timm Thanks
Eddie Izzard Voldemort (voice)
Neal Adams Thanks
Phil Lord Producer
Bob Kane Characters
Daniel Edward Mora Loop Group Coordinator
Adam Devine The Flash (voice)
Jack Kirby Thanks
Bradford Lewis Executive Producer
Chad Smith Musician
Òscar Senén Orchestrator
Bob Rozakis Thanks
Christopher Miller Producer
Joan Martorell Orchestrator
Bill Finger Characters
Doug Benson Bane (voice)
John Powers Middleton Co-Producer
Doug Nicholas Additional Voices (voice)
Christopher S. Aud Sound Effects Editor
Will Kaplan Music Editor
Kristen Anderson Set Designer
John Simpson Foley Artist
Frank Miller Thanks
Nicholas Stoller Creative Consultant
Mary Hidalgo Casting
Barbara Harris ADR Voice Casting
Max Allan Collins Thanks
Andrew Miller Sound Effects Editor
Paul Dini Thanks
Will Allegra Executive Producer
Erik Sommers Screenplay
Chris McKay Director, Pilot Bill / Additional Voices (voice)
Mort Weisinger Thanks
Roy Lee Producer
Johannes Vogel Conductor
Marv Wolfman Thanks
James Bleakley Layout
Seth Grahame-Smith Screenplay, Story
Joe Shuster Characters
Gerry Conway Thanks
George Pérez Thanks
Ralph Garman Reporter #2 (voice)
Lorne Balfe Original Music Composer