JLA (TV Series)

The Justice League

 * Tim Daly - Clark Kent/Superman
 * Kevin Conroy - Bruce Wayne/Batman
 * Susan Eisenberg - Princess Diana/Wonder Woman
 * Nathan Fillon - Hal Jordan/Green Lantern
 * Michael Rosenbaum - Barry Allen/Flash
 * Miguel Ferrer - Arthur Curry/Aquaman
 * Carl Lumbly - J'onn J'onzz/Martian Manhunter

The Injustice League

 * Clancy Brown - Lex Luthor
 * Steven Blum - The Joker
 * Claudia Black - Barbra Ann Minerva/Cheetah
 * Jason Issacs - Thaal Sinestro/Sinestro
 * Travis Willingham - Gorilla Grodd
 * Keith David - Black Manta
 * Kevin Michael Richardson - Ma'alefa'ak J'onzz/Ma'alefa'ak
 * Emmanuelle Chriqui - Star Sapphire
 * Rebecca Romijn - Poison Ivy

Other Villians

 * Keith Szarabajka - Victor Fries/Mister Freeze
 * Nolan North - Oswald Copplebot/Penguin
 * Rick D. Wasserman - Basil Karlo/Clayface
 * Lex Lang - Atomic Skull
 * Paul Blackthorne - John Corben/Metallo
 * Crispin Freeman - Samuel Scudder/Mirror Master
 * Carlos Alazaraqui - Bane
 * Arnold Vosloo - Kobra, Teth-Adam/Black Adam
 * Bruce Greenwood - Wotan
 * Dee Bradley Baker - Ra's al Ghul
 * Keone Young - Sensei
 * John DiMaggio - Starro
 * Michael Ironside - Darkseid
 * Steven Blum - The Faceless Hunter
 * Wade Williams - Roman Sionis/Black Mask
 * Olivia D'Abo - Morgaine Le Fay
 * Corey Burton - Brainiac, Cyrus Gold/Solomon Grundy
 * Travis Willingham - Bizzaro
 * John Kassir - Jonathan Crane/Scarecrow
 * Tasia Valenza - Pamela Isley/Poison Ivy
 * Phil Morris - Vandar Aag/Vandal Savage

Supporting Characters

 * Stana Katic - Talia al Ghul
 * David Kaufman - Jimmy Olsen
 * Jim Piddock- Alfred Pennyworth
 * Dana Delany - Lois Lane
 * Kari Wuhrer - Vicki Vale
 * James Horan - Jack Ryder
 * John DiMaggio - Bo "Bibbo" Bibbowski
 * Kari Wahlgren - Cat Grant
 * Jason Marsden - Lucas "Snapper" Carr
 * Tom Kane - Commissoner James Gordon
 * Grey DeLisle - Selina Kyle/Catwoman
 * Lex Lang - Steven Trevor
 * Julianne Grossman - Etta Candy
 * Virgina Madsen - Queen Hippolyta

Other Heroes

 * Neal McDonough - Oilver Queen/Green Arrow
 * James Remar - Katar Hol/Hawkman
 * John C. McGinley - Ray Palmer/Atom
 * Vanessa Marshall - Dinah Lance II/Black Canary
 * Tom Kenny - Patrick O'Brien/Plastic Man
 * Jeff Bennett - John Ulthoon/Red Tornado
 * Maria Canals - Shyera Hol/Hawkwoman
 * Jennifer Hale - Zatanna Zatara/Zatanna, Tora Olafsdotter/Ice
 * Cedric Yarbrough - Jason Rasuch/Firestorm
 * James Horan - Kent Nelson/Dr. Fate
 * Crispin Freeman - Michael Jon Carter/Booster Gold
 * Steven Blum - Ted Kord/Blue Beetle
 * Xander Berkeley - Nathaniel Adam/Captain Atom
 * Ioan Gruffudd - Scott Free/Mr. Miracle
 * Julianne Grossman - Barda Free/Big Barda
 * Rob Lowe - Billy Batson/Captain Marvel
 * Nolan North - Buddy Baker/Animal Man
 * Gina Torres - Mari McCabe/Vixen
 * Peter Lurie - Dimitri Pushkin/Rocket Red
 * Lauren Tom - Kimiyo Hoshi/Dr. Light
 * Ana Ortiz - Beatriz da Costa/Fire
 * Jeremy Piven - Ralph Dinby/Enlongated Man
 * Cam Clarke - Rex Mason/Metamorpho
 * Michael Dorn - John Henry Irons/Steel
 * Michael Jai White - John Stewart/Green Lantern
 * Michael T. Wiess - Jason Blood/Etrigan The Demon
 * Khary Payton - Victor Stone/Cyborg
 * Tony Todd - Arnus/Augustus Freeman IV/Icon

Crew

 * Andrea Romano, Jamie Thomason - Casting & Voice Directors