Josh Keaton
Green Lantern / Hal Jordan (voice) (26 eps)
Kevin Michael Richardson
Kilowog (voice) (26 eps)
Jason Spisak
Razer (voice) (26 eps)
Grey DeLisle
Aya (voice) (26 eps)
Brian George
Appa Ali Apsa (voice) (13 eps)
Tom Kenny
Zilius Zox / Salaak (voice) (10 eps)
Susanne Blakeslee
Sayd (voice) (6 eps)
Jennifer Hale
Carol Ferris / Star Sapphire / Princess Gi'ata (voice) (5 eps)
Ian Abercrombie
Ganthet (voice) (5 eps)
Sarah Douglas
Science Director (voice) (5 eps)
Phil Morris
Saint Walker (voice) (4 eps)
Juliet Landau
Drusa (voice) (3 eps)
Jeff Bennett
Tomar-Re (voice) (3 eps)
Diedrich Bader
Guy Gardner (voice) (3 eps)
Kurtwood Smith
Shyir Rev (voice) (2 eps)
Corey Burton
Cleric Loran (voice) (2 eps)
Rob Paulsen
Goggan / Bumpy (voice) (2 eps)
John DiMaggio
Kothak (voice) (2 eps)
Will Friedle
Prince Ragnar (voice) (2 eps)
Tara Strong
Iolande (voice) (2 eps)
Vanessa Marshall
Galia (voice) (2 eps)
Clancy Brown
Zartok (voice) (2 eps)
Robert Englund
Myglom (voice) (1 eps)
Wayne Knight
Captain Goray (voice) (1 eps)
Robin Atkin Downes
Gil Broome / Steam Lantern (voice) (1 eps)
Ron Perlman
Sinestro (voice) (1 eps)
Dee Bradley Baker
Larfleeze (voice) (1 eps)