J.G. Quintel
Mordecai / Hi Five Ghost (voice) (257 eps)
William Salyers
Rigby (voice) (257 eps)
Mark Hamill
Skips (voice) (257 eps)
Sam Marin
Benson / Pops / Muscle Man (voice) (257 eps)
Roger Craig Smith
Thomas (voice) (164 eps)
Minty Lewis
Eileen (voice) (89 eps)
Janie Haddad Tompkins
Margaret (voice) (62 eps)
Courtenay Taylor
Starla (voice) (48 eps)
Steve Blum
Carter (voice) (38 eps)
Fred Tatasciore
Werewolf (voice) (37 eps)
Vanessa Marshall
Toothpick Sally (voice) (32 eps)
Matthew Mercer
Chance Sureshot / Recap Robot (voice) (31 eps)
John Cygan
Barber / Convict (voice) (28 eps)
Ali Hillis
Samantha / Playco Tester / Kid #2 (voice) (26 eps)
Linda Cardellini
Cloudy J (voice) (25 eps)
David Kaye
Reginald (voice) (25 eps)
Robin Atkin Downes
Gary (voice) (24 eps)
Jeff Bennett
Chief Executive / Magician / Son (voice) (23 eps)
David Ogden Stiers
Mr. Maellard (voice) (20 eps)
Julian Holloway
Death (voice) (19 eps)
Troy Baker
Klorgbane the Destroyer / Griswald (voice) (15 eps)
D.C. Douglas
Colonel Rawls (voice) (11 eps)
Robert Englund
Anti-Pops (voice) (10 eps)
Kurtwood Smith
Gene (voice) (8 eps)
Armin Shimerman
Dr. Henry (voice) (8 eps)
Richard McGonagle
Carrey O'Key (voice) (8 eps)
Jennifer Hale
Hilary / Thomas' Mom (voice) (8 eps)
Rich Sommer
Del Hanlon (voice) (8 eps)
Grey DeLisle
Desdemona / Desdemona's Mom (voice) (7 eps)
Paul F. Tompkins
Skunk (voice) (6 eps)
Travis Willingham
Anatoly / General Pat McMurphy / American Official (voice) (6 eps)
Sean Szeles
Andy (voice) (6 eps)
Adam Pally
Party Horse (voice) (6 eps)
Ben Diskin
Steffen (voice) (6 eps)
Andres Salaff
Heckler / Jensen (voice) (5 eps)
David Koechner
Principal Dean (voice) (5 eps)
Andy Daly
Wallpaper Man / Politician Dude / Delivery Guy / Kid #2 (voice) (4 eps)
Laura Bailey
Natalia / Secretary Clifton (voice) (4 eps)
Eddie Pepitone
Sherm (voice) (4 eps)
Feodor Chin
Earl (voice) (4 eps)
Dee Bradley Baker
Frivola-Kranus (voice) (4 eps)
Trevor Devall
HD DVD (voice) (4 eps)
Gillian Jacobs
BluRay (voice) (4 eps)
Julián Rebolledo
Don (voice) (3 eps)
Andrew Kishino
Game Master (voice) (3 eps)
Phil LaMarr
Kyle Garrity / Puppy Man / Body Bag Guy #2 (voice) (3 eps)
James Hong
Warlock / Manager (voice) (3 eps)
Jason Mantzoukas
Sad Sax Guy (voice) (3 eps)
Yuri Lowenthal
Adam / Kid / Guy (voice) (3 eps)
David Keith
Streaming (voice) (3 eps)
Christine Baranski
Guardian (voice) (3 eps)
S. Scott Bullock
Dude / Coffee Bean / Fist Pump (voice) (2 eps)
Roger L. Jackson
Baby #1 (voice) (2 eps)
April Stewart
Susan (voice) (2 eps)
Brad Culver
Velvet Overkill / Maracas Guy (voice) (2 eps)
Carl Weathers
God of Basketball voice) (2 eps)
Rich Fulcher
Answering Machine / Smoke Signal (voice) (2 eps)
Michael Dorn
Thomas (voice) (2 eps)
Kyle Kinane
Doorman (voice) (2 eps)
Ed Asner
Santa Claus (voice) (2 eps)
Thomas Haden Church
Quillgin (voice) (2 eps)
Matt Price
Quips (voice) (2 eps)
Dawnn Lewis
Duck Lady / Woman #2 / Woman #3 (voice) (2 eps)
Wayne Knight
Guardian of the Friend Zone (voice) (2 eps)
Terry Crews
Broc Stettman (voice) (2 eps)
Josh Keaton
Auto T (voice) (2 eps)
LeToya Luckett
Jennifer (voice) (2 eps)
Chord Overstreet
Dusty B (voice) (2 eps)
Matthew Yang King
Yuji (voice) (2 eps)
Tim Curry
Hot Dog Leader (voice) (2 eps)
Danny Cooksey
Reggie (voice) (2 eps)
Zosia Mamet
Celia (voice) (2 eps)
Jonathan Oldham
Weber / Outback Juey / Prime Minister (voice) (2 eps)
Rina Hoshino
Opening Theme Vocals (voice) (2 eps)
Steve Agee
Zaxon (voice) (2 eps)
Chelsea Kane
Cheezers Lady / Gum Girl (voice) (2 eps)
James Adomian
Harry (voice) (2 eps)
Kate Higgins
Natalie Williams / Mary Stone / Computer (voice) (2 eps)
Neil deGrasse Tyson
Self (voice) (2 eps)
Alastair Duncan
William / Pilgrim (voice) (2 eps)
Katey Sagal
Hilary (voice) (2 eps)
Edie McClurg
Monique Sorrenstein (voice) (2 eps)
Casey Kasem
Vocalist (voice) (uncredited) (2 eps)
Tyler, the Creator
Blitz Comet / Big Trouble (voice) (1 eps)
B.J. Ward
Dr. Asinovskovich / Lady / Woman (voice) (1 eps)
Scott MacDonald
Major Williams (voice) (1 eps)
James Sie
Jimmy (voice) (1 eps)
Eamon Pirruccello
Kid #1 (voice) (1 eps)
Greyden Massey
Kid #2 (voice) (1 eps)
Alan Sklar
Father Time (voice) (1 eps)
Roger Rose
Infomercial VO (voice) (1 eps)
Tommy Lister Jr.
Bobby (voice) (1 eps)
Kari Wahlgren
Movie Actress (voice) (1 eps)
Lee Reherman
The Fire Marshall / Forearmageddon (voice) (1 eps)
Sunil Malhotra
Teacher (voice) (1 eps)
Mitzi McCall
Librarian (voice) (1 eps)
Tara Platt
Mom (voice) (1 eps)
MC Lyte
Demel-Ishun (voice) (1 eps)
Donald Glover
Alpha Dog (voice) (1 eps)
Elle Newlands
Death's Wife (voice) (1 eps)
Natasha Leggero
Ladonna / Girl in Line (voice) (1 eps)
Toby Jones
Cart (voice) (1 eps)
Seymour Cassel
Tony (voice) (1 eps)
Jaleel White
Daryl / Cool Shadé (voice) (1 eps)
Richard Doyle
Old Guy #1 (voice) (1 eps)
Amber Hood
Huggstable #1 / Huggstable #2 / Huggstable #3 (voice) (1 eps)
Lex Lang
Barry / Police Officer #2 (voice) (1 eps)
David Sobolov
Dale (voice) (1 eps)
Bobcat Goldthwait
Johnny Crasher (voice) (1 eps)
Debra Wilson
Council Woman / Blonde Girl / Thunder Girl #1 (voice) (1 eps)
Tim Russ
Sergeant / Helicopter Pilot (voice) (1 eps)
Mark Deklin
Corporal (voice) (1 eps)
Rhomeyn Johnson
General (voice) (1 eps)
Steven Weber
Jumpin' Jim (voice) (1 eps)
Chris Cox
Benny Harris (voice) (1 eps)
Liam O'Brien
Tango (voice) (1 eps)
Christopher McDonald
Carl Putter (voice) (1 eps)
Jon Daly
Teddy / Oren / Stock Broker Guy (voice) (1 eps)
Joel McHale
DVD (voice) (1 eps)
Kevin Michael Richardson
Happy Birthday (voice) (1 eps)
Dean Cameron
Suit (voice) (1 eps)
Paul Scheer
Cat Masterson (voice) (1 eps)
George Takei
Daisuke (voice) (1 eps)
Amy Sedaris
Mrs. Kessler / Jayla (voice) (1 eps)
Awkwafina
Apple / Waitress #1 (voice) (1 eps)
Elizabeth Pan
Vivian / Girl #1 (voice) (1 eps)
John Wusah
Kobe (voice) (1 eps)
Jimmy Tang
Lebron / Announcer / Boy (voice) (1 eps)
Gwendoline Yeo
Mary / Waitress #2 / Girl #2 (voice) (1 eps)
Jemaine Clement
Ziggy (voice) (1 eps)
Wallace Shawn
Evil Brain (voice) (1 eps)
Kate Micucci
Roxy (voice) (1 eps)
Steve Little
Spacey McSpaceTree (voice) (1 eps)
John Gemberling
Steve Mikulski (voice) (1 eps)
Yvette Nicole Brown
The Seer (voice) (1 eps)
Nolan North
Host / Dude / Centaur #2 (voice) (1 eps)
Ed Begley Jr.
William (voice) (1 eps)
