Cast 26
Richard Steven Horvitz
Zim (voice) (46 episodes)
Andy Berman
Dib (voice) (46 episodes)
Rosearik Rikki Simons
GIR (voice) (46 episodes)
Melissa Fahn
Gaz (voice) (46 episodes)
Lucille Bliss
Ms. Bitters (voice) (46 episodes)
Rodger Bumpass
Professor Membrane (voice) (46 episodes)
Kevin McDonald
Almighty Tallest Purple (voice) (46 episodes)
Wally Wingert
(7 episodes)Red / SIR (voice) (1 episode)
Mo Collins
(3 episodes)RoboMom / Zita (voice) (1 episode)
Danny Cooksey
(3 episodes)
Olivia d'Abo
(3 episodes)
Candi Milo
Mrs. Buggy / Giganto Baby (voice) (1 episode)Clara / Woman in Crowd (voice) (1 episode)Girl (voice) (1 episode)
Jhonen Vasquez
Computer Voice / Old Kid / Brian (voice) (1 episode)Minimoose / Computer / Precocious Kid / Kid in Crowd (voice) (1 episode)
R. Lee Ermey
(1 episode)
Eliza Schneider
(1 episode)
S. Scott Bullock
(1 episode)
Sherman Howard
Oog-Oh (voice) (1 episode)
Dwight Schultz
(1 episode)
Greg Ellis
(1 episode)
Philece Sampler
Scientist #4 / Germ Woman / Tiny Germ Voice (voice) (1 episode)
Dee Bradley Baker
Santa Gerg / Guy in Crowd #1 / Cutest Little Kid (voice) (1 episode)
Kathryn Fiore
Kid / Santa Fan #2 / Little Girl (voice) (1 episode)
Jeffrey Jones
Presidentman / Crowd Man / Guy in Crowd #2 (voice) (1 episode)
Brad Abrell
Announcer (voice) (1 episode)
Phil LaMarr
The Letter M (voice) (1 episode)
Michael McDonald
RoboDad / Crewman (voice) (1 episode)
Art 16
John Fountain
Art Department Manager (36 episodes)
Kyle Menke
Storyboard Artist (19 episodes)
Chris Graham
Storyboard Artist (16 episodes)
Ian Graham
Storyboard Artist (15 episodes)
Shawn Murray
Storyboard Artist (12 episodes)
Bryan Konietzko
Storyboard Artist (10 episodes)
Rayfield Angrum
Storyboard Artist (8 episodes)
Joe Daniello
Storyboard Artist (7 episodes)
Miyuki Hoshikawa
Storyboard Artist (5 episodes)
Louie del Carmen
Storyboard Artist (4 episodes)
Dave Krocker
Storyboard Artist (3 episodes)
Ron Brewer
Storyboard Artist (3 episodes)
Perry Zombolas
Storyboard Artist (2 episodes)
Greg Colton
Storyboard Artist (2 episodes)
Scooter Tidwell
Storyboard Artist (2 episodes)
Steve Ressel
Storyboard Artist (1 episode)
Directing 1
Steve Ressel
Director (46 episodes)
Writing 7
Jhonen Vasquez
Writer (25 episodes)
Eric Trueheart
Writer (20 episodes)
Rob Hummel
Writer (20 episodes)
Roman Dirge
Story (2 episodes)Idea (1 episode)Writer (3 episodes)
Courtney Lilly
Writer (2 episodes)
Danielle Koenig
Writer (2 episodes)
Frank Conniff
Writer (2 episodes)