Tara Strong
Ben Tennyson (voice) (52 eps)
Meagan Moore
Gwen Tennyson (voice) (52 eps)
Paul Eiding
Grandpa Max (voice) (52 eps)
Dee Bradley Baker
Stinkfly / Wildmutt (voice) (40 eps)
Steve Blum
Ghostfreak / Heatblast / Vilgax (voice) (39 eps)
Richard McGonagle
Four Arms (voice) (39 eps)
Jim Ward
Diamondhead / Wildvine / XLR8 (voice) (39 eps)
Fred Tatasciore
Cannonbolt (voice) (29 eps)
Richard Steven Horvitz
Grey Matter (voice) (21 eps)
Khary Payton
Hex (voice) (6 eps)
Richard Doyle
Enoch (voice) (5 eps)
Dwight Schultz
Dr. Animo (voice) (4 eps)
Charlie Schlatter
Kevin Levin (voice) (3 eps)
Jennifer Hale
Teacher / Jamie (voice) (3 eps)
Kari Wahlgren
Charmcaster (voice) (3 eps)
Vanessa Marshall
Diamond Head Gwen / Four Arms Gwen (voice) (3 eps)
Tom Kane
Ultimos (voice) (3 eps)
Kim Mai Guest
Pinky / Kid (voice) (3 eps)
Kath Soucie
Joan / Teen #2 / Cowgirl (voice) (3 eps)
Cree Summer
Frightwig (voice) (2 eps)
Jeff Doucette
Thumbskull (voice) (2 eps)
Billy West
Guard / Punk #2 (voice) (2 eps)
Dave Fennoy
Radio Newscaster / Doctor (voice) (2 eps)
Nancy Linari
Automated Voice (voice) (2 eps)
Adam Wylie
Bullie #2 (voice) (2 eps)
Grey DeLisle
Heatblast Gwen (voice) (2 eps)
Dave Wittenberg
Upchuck (voice) (2 eps)
Michael Dorn
Vicktor (voice) (2 eps)
Robert Patrick
Phil (voice) (1 eps)
Michael Reisz
Kevin Levin (voice) (1 eps)
Nolan North
Teen Attendant / Henchman (voice) (1 eps)
Rosalind Chao
Councilwoman Liang (voice) (1 eps)
Miriam Flynn
Aunt Vera (voice) (1 eps)
John Kassir
Zombozo (voice) (1 eps)
Larry Cedar
Howell (voice) (1 eps)
Nicholas Guest
Clancy (voice) (1 eps)
Robin Atkin Downes
Jonah (voice) (1 eps)
Walker Edmiston
Marty (voice) (1 eps)
Mikey Kelley
Gang #2 / Attendant / Helicopter Pilot (voice) (1 eps)
Robert Picardo
Leader Alien (voice) (1 eps)
James C. Mathis III
Enforcer Alien (voice) (1 eps)
Michael Gough
Lt. Steel (voice) (1 eps)
Bill Ratner
The Seer (voice) (1 eps)
Jack Angel
Technorg (voice) (1 eps)
Armin Shimerman
Slix (voice) (1 eps)
Greg Ellis
Synaptak (voice) (1 eps)
John DiMaggio
Vulkanus (voice) (1 eps)
Patricia Lentz
Mildred / Gypsy (voice) (1 eps)
Jennifer Malenke
Missy (voice) (1 eps)
Miguel Nájera
Wes (voice) (1 eps)
Bettina Bush
Kai (voice) (1 eps)
Keone Young
Ishyama (voice) (1 eps)
Clancy Brown
Kenko (voice) (1 eps)
Josh Keaton
Dean (voice) (1 eps)
John Cygan
Abel North (Kangaroo Commando) / Kane North (voice) (1 eps)
Rob Pinkston
Todd (voice) (1 eps)
Jess Harnell
Band Member #1 / Announcer (voice) (1 eps)
Marc Thompson
Vance (voice) (1 eps)
Richard Green
Benmummy (voice) (1 eps)