Tom Cruise Jerry Maguire (archive footage) (uncredited)
Channing Tatum Superman (voice)
Billy Dee Williams Two-Face (voice)
Ralph Fiennes Alfred Pennyworth (voice)
Zach Galifianakis Joker (voice)
Seth Green King Kong (voice)
Michael Cera Robin / Dick Grayson (voice)
Will Arnett Batman / Bruce Wayne (voice)
Jamie Chung Animation
Rosario Dawson Batgirl / Barbara Gordon (voice)
Jason Mantzoukas Scarecrow (voice)
Paul Dini Thanks
Jack Kirby Thanks
Zoë Kravitz Catwoman (voice)
Mariah Carey Mayor McCaskill (voice)
Susan Bennett 'Puter (voice)
Jemaine Clement Sauron (voice)
Neal Adams Thanks
Ralph Garman Reporter #2 (voice)
Héctor Elizondo Jim Gordon (voice)
Chuck Dixon Thanks
Jonah Hill Green Lantern (voice)
Ellie Kemper Phyllis (voice)
Jenny Slate Harley Quinn (voice)
Riki Lindhome Poison Ivy (voice)
Joe Samachson Thanks
Benjamin Melniker Executive Producer
Joe Certa Thanks
Eddie Izzard Voldemort (voice)
Adam Devine The Flash (voice)
Kate Micucci Clayface (voice)
Joan Martorell Orchestrator
Bradford Lewis Executive Producer
Bob Rozakis Thanks
Nicholas Stoller Creative Consultant
Chris McKenna Screenplay
Doug Benson Bane (voice)
Patrick Christensen ADR Mixer
William Moulton Marston Characters
Conan O'Brien The Riddler (voice)
Kristen Anderson Set Designer
Frank Miller Thanks
Max Allan Collins Thanks
Andrew Miller Sound Effects Editor
Bob Kane Characters
Chad Smith Musician
John Simpson Foley Artist
Bill Finger Characters
Steve Englehart Thanks
Will Allegra Executive Producer
Phil Lord Producer
Gene Colan Thanks
Jerry Siegel Characters
Erik Sommers Screenplay
Barbara Harris ADR Voice Casting
Johannes Vogel Conductor
Glenn Ficarra Creative Consultant
Roy Lee Producer
Chris McKay Director, Pilot Bill / Additional Voices (voice)
Christopher Miller Producer
Thomas J. O'Connell ADR Mixer
Joe Shuster Characters
Jonathan Tappin Additional Editing
Mary Hidalgo Casting
Bruce Timm Thanks
John Requa Creative Consultant
Mort Weisinger Thanks
Lorne Balfe Original Music Composer
Paul Norris Thanks
John Venzon Editor, Additional Voices (voice)
Marv Wolfman Thanks
Chris Hardwick Reporter #3 (voice)