- Malcolm McDowell - Mad Mod (voice)
- Henry Rollins - Johnny Rancid (voice)
- Michael Rosenbaum - Kid Flash (voice)
- Tracey Walter - Puppet King (voice)
- Michael Clarke Duncan - Krall / Hayden (voice)
- Keith Szarabajka - Trigon (voice)
- Greg Ellis - Malchior (voice)
- Virginia Madsen - Arella (voice)
- Dave Coulier - Captain / Tramm (voice)
- Russi Taylor - Timmy Tantrum / Melvin (voice)
- Billie Hayes - Mother Mae-Eye (voice)
- Stephen Root - Val Yor (voice)
- Tony Jay - Narrator (voice
- Tom Kane - Bob (voice)
- Marc Worden - Killer Moth (voice)
- Keith David - Atlas (voice)
- James Hong - Professor Chang (voice)
- Clancy Brown - Trident (voice)
- David Johansen - Ding Dong Daddy Dowd (voice)
- Takayo Fischer - Chu-Hui the True Master (voice)
- Xander Berkeley - Mento / General Immortus (voice)
- Xander Berkeley - Warp (voice)
- Tress MacNeille - Horror Movie Actress (voice)
- Judge Reinhold - Negative Man (voice)
- Keone Young - Katarou / The Monkey (voice)
- Bumper Robinson - Hotspot (voice)
- T'Keyah Crystal Keymáh - Bumblebee (voice)
- T'Keyah Crystal Keymáh - Bumblebee / Old Lady / Young Boy / Computer Geek (voice)
- Peter Onorati - Robotman (voice)
- Wil Wheaton - Aqualad (voice)
- Wil Wheaton - Aqualad / Computer Geek (voice)
- Diane Delano - Pantha (voice)
- Freddy Rodríguez - Más y Menos (voice)
- Andrea Romano - Headmistress (voice)
- Rino Romano - Kai (voice)
- David Sobolov - Cron (voice)
- S. Scott Bullock - Thunder (voice)
- James Arnold Taylor - Old Fisherman / Pelican / Space Hero (voice)
- James Arnold Taylor - Overload / Cash (voice)
- Quinton Flynn - Lightning (voice)
- Tom Kenny - Mumbo / Any Card (voice)
- Tom Kenny - Mumbo / Fixit (voice)
- John DiMaggio - Brother Blood (voice)
- John DiMaggio - Spike (voice)
- Mike Erwin - Speedy (voice)
- Mike Erwin - Additional Voices (voice)
- Mike Erwin - Speedy / Computer Geek (voice)
- Jason Marsden - Billy Numerous (voice)
- Jason Marsden - Red Star (voice)
- Ron Perlman - Slade (voice)
- Matt Levin - Sammy (voice)
- Glenn Shadix - The Brain / Monsieur Mallah (voice)
- Glenn Shadix - Monsieur Mallah (voice)
- Jim Cummings - Master of Games / Wildebeest (voice)
- Alexander Polinsky - Control Freak (voice)
- Jeff Bennett - Anchorman / Armadillo Guy / Superspy (voice)
- Thomas Haden Church - Killer Moth (voice)
- Will Friedle - Fang / Frozen Promgoer (voice)
- Cathy Cavadini - Alien Woman / Chrysalis Hunter (voice)
- Rob Paulsen - The Source (voice)
- Rob Paulsen - Adventurer / Game Show Host / Joaquim (voice)
- Alan Shearman - Galfore (voice)
- Dee Bradley Baker - Additional Voices (voice)
- Dee Bradley Baker - Plasmus (voice)
- Dee Bradley Baker - Cinderblock (voice)
- Dee Bradley Baker - Gnarrk / Tramm (voice)
- Dee Bradley Baker - Werebeast (voice)
- Dee Bradley Baker - Glgrdsklechhh (voice)
- Dee Bradley Baker - Cinderblock / Plasmus (voice)
- Dee Bradley Baker - Ad Announcer / Dignified Host / Sportscaster (voice)
- Dee Bradley Baker - Thief / Wildebeest (voice)
- Dee Bradley Baker - Silkie (voice)
- Dee Bradley Baker - Ternion (voice)
- Dee Bradley Baker - Larry the Titan (voice)
- Dee Bradley Baker - Space Monster (voice)
- Dee Bradley Baker - Alien Dog / Soto (voice)
- Dee Bradley Baker - Le Blanc / Gnarrk / Cinderblock (voice)
- Dee Bradley Baker - Gnarrk (voice)
- Dee Bradley Baker - Silkie / Le Blanc (voice)
- Dee Bradley Baker - Cinderblock / Plasmus / Overload (voice)
- Ashley Johnson - Terra (voice)
- Ashley Johnson - Schoolgirl (voice)
- Kimberly Brooks - Sarasim (voice)
- Kevin Michael Richardson - Trigon (voice)
- Kevin Michael Richardson - Mammoth (voice)
- Kevin Michael Richardson - See-More / Mammoth (voice)
- Kevin Michael Richardson - Trigon / The Guardian (voice)
- Kevin Michael Richardson - The Bear / The Snake (voice)
- Kevin Michael Richardson - Mammoth / See-More (voice)
- Lauren Tom - Gizmo / Jinx (voice)
- Lauren Tom - Gizmo (voice)
- Lauren Tom - Jinx (voice)
- Ed O'Ross - Raskov (voice)
- Rodger Bumpass - Dr. Light (voice)
- Gary Anthony Sturgis - Gordanian / Trogaar (voice)
- Lisa Kaplan - Additional Voices (voice)
- Andrea Romano
- Tramm Wigzell
- Glen Murakami
- Sam Register
- Kristopher Carter
- Lolita Ritmanis
- ????
- ????
- Michael McCuistion
Judge Reinhold hace el papel de Negative Man (voice).
Ron Perlman interpreta a Slade (voice) en la serie.
Xander Berkeley interpreta a Warp (voice) en la serie.
Greg Ellis interpreta a Punk Rocket (voice) en la serie.
Wil Wheaton hace el papel de Aqualad / Computer Geek (voice).
Tracey Walter hace el papel de Puppet King (voice).
Greg Cipes interpreta a Beast Boy (voice) en la serie.
Scott Menville interpreta a Robin (voice) en la serie.
Khary Payton interpreta a Cyborg (voice) en la serie.
Tara Strong interpreta a Raven (voice) en la serie.
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