J.G. Quintel
Mordecai / Hi Five Ghost (voice) (39 eps)
William Salyers
Rigby (voice) (39 eps)
Mark Hamill
Skips (voice) (39 eps)
Sam Marin
Benson / Pops / Muscle Man (voice) (39 eps)
Roger Craig Smith
Video Store Dave / Video Game Announcer / Agent #2 (voice) (20 eps)
Janie Haddad Tompkins
Margaret / Girl #1 / Girl #3 (voice) (12 eps)
Minty Lewis
Eileen (voice) (8 eps)
Courtenay Taylor
Benson's Mom / Benson's Sister (voice) (8 eps)
Julian Holloway
Archie (voice) (5 eps)
Robin Atkin Downes
Herold (voice) (5 eps)
Troy Baker
Klorgbane the Destroyer (voice) (3 eps)
Steve Blum
Techmo / Doom-Ma-Geddon / Computer (voice) (3 eps)
Paul F. Tompkins
Filbert (voice) (2 eps)
Andy Daly
Darryl (voice) (2 eps)
Richard McGonagle
Bear Dog / Rent a Cop #1 (voice) (2 eps)
Jeff Bennett
Axyl / Jerry / Larry (voice) (2 eps)
David Kaye
Baby #2 (2 eps)
Tyler, the Creator
Blitz Comet / Big Trouble (voice) (1 eps)
David Ogden Stiers
Mr. Maellard (voice) (1 eps)
Tara Platt
Mom (voice) (1 eps)
Robert Englund
Stagman (voice) (1 eps)
Carl Weathers
God of Basketball voice) (1 eps)
MC Lyte
Demel-Ishun (voice) (1 eps)
Donald Glover
Alpha Dog (voice) (1 eps)
James Hong
Warlock / Manager (voice) (1 eps)
Rich Fulcher
Answering Machine / Smoke Signal (voice) (1 eps)
Brad Culver
Velvet Overkill / Maracas Guy (voice) (1 eps)
Elle Newlands
Death's Wife (voice) (1 eps)
Michael Dorn
Thomas (voice) (1 eps)
Natasha Leggero
Ladonna / Girl in Line (voice) (1 eps)
Kyle Kinane
Doorman (voice) (1 eps)
Fred Tatasciore
Muscle Dad (voice) (1 eps)
Toby Jones
Cart (voice) (1 eps)
Armin Shimerman
Buttonwillow (voice) (1 eps)
Kurtwood Smith
Gene / Park Ranger #3 (voice) (1 eps)
Dawnn Lewis
JB / Fun Fun Zone Employee (voice) (1 eps)
John Cygan
Main Bear / FBI Soldier (voice) (1 eps)
Linda Cardellini
Cloudy J (voice) (1 eps)