Cast and credits of The Most Horrible Xmas Ever (2002)

Steve Ressel

Richard Steven Horvitz
Invader Zim / Crowd Choir / Slaves (voice) (as Richard Horvitz)

Rosearik Rikki Simons
GIR / Santa Fan #1 / Slaves / Man in Crowd 2 (voice) (as Rosearik Rikki Simons)

Andy Berman
Dib Membrane / Crowd Choir / Slaves (voice)

Melissa Fahn
Gaz Membrane / Orphan Children / Crowd Choir (voice)

Dee Bradley Baker
Santa Gerg / Guy in Crowd / Cutest Little Kid (voice)

Rodger Bumpass
Professor Membrane / Man in Crowd / Crowd Choir (voice)

Kathryn Fiore
Kid / Santa Fan #2 / Little Girl (voice)

Jeffrey Jones
Presidentman / Crowd Man / Guy in Crowd #2 (voice)

Candi Milo
Clara / Woman in Crowd / Crowd Woman (voice) (as Candy Milo)

Jhonen Vasquez
Minimoose / Computer / Precocious Kid / Kid in Crowd (voice) (as Mr. Scolex)

Fred Tatasciore
WHUH News Anchor / Human Slave / Mr. Sludgy / Santa Walla (voice)