Richard Steven Horvitz
Zim (voice)
Andy Berman
Dib (voice)
Rosearik Rikki Simons
GIR (voice)
Melissa Fahn
Gaz (voice)
Lucille Bliss
Ms. Bitters (voice)
Rodger Bumpass
Professor Membrane (voice)
Kevin McDonald
Almighty Tallest Purple (voice)
Wally Wingert
Mo Collins
RoboMom / Zita (voice)
Danny Cooksey
Olivia D'Abo
Candi Milo
Mrs. Buggy / Giganto Baby (voice)
Jhonen Vasquez
Minimoose / Computer / Precocious Kid / Kid in Crowd (voice)
R. Lee Ermey
Eliza Schneider
S. Scott Bullock
Sherman Howard
Oog-Oh (voice)
Dwight Schultz
Greg Ellis
Philece Sampler
Scientist #4 / Germ Woman / Tiny Germ Voice (voice)
Dee Bradley Baker
Santa Gerg / Guy in Crowd #1 / Cutest Little Kid (voice)
Kathryn Fiore
Kid / Santa Fan #2 / Little Girl (voice)
Jeffrey Jones
Presidentman / Crowd Man / Guy in Crowd #2 (voice)
Brad Abrell
Announcer (voice)
Phil LaMarr
The Letter M (voice)
Michael McDonald
RoboDad / Crewman (voice)
