This is a list of actors and actresses from Cartoon Network's animated franchise The Grim Adventures of Billy & Mandy
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Regular cast
Main cast
- Grey DeLisle: Mandy; Milkshakes.
- Greg Eagles: Grim; Sperg.
- Richard Steven Horvitz: Billy; Harold.
- Vanessa Marshall: Irwin.
Recurring cast
- Diedrich Bader: Hoss Delgado.
- Dee Bradley Baker: Mandy's Dad.
- Steve Blum
- Cam Clarke
- Debi Derryberry: Nergal Jr.
- Jennifer Hale: Gladys.
- Tom Kenny
- Phil LaMarr: Dracula; Judge Roy Spleen; Hector Con Carne.
- Rachael MacFarlane: Eris; Mindy.
- Armin Shimerman: General Skarr.
- Jake Thomas: Nigel Planter.
- David Warner: Nergal (first two appearances).
- Frank Welker: Scooby-Doo; Barney Rubble.
- Billy West
- John Vernon: Dean Toadblatt (first three appearances).
- "Weird Al" Yankovic: Squid Hat.
- Announcer in the video game.
Guest stars
Television series (The Grim Adventures of Billy & Mandy)
- Jack Angel: Master Control.
- Michael Bell: Bunny #1.
- Jeff Bennett: Brain-Eating Meteor (speaking voice).
- Susanne Blakeslee: Crabina.
- Earl Boen: Doctor/TV Narrator.
- Mary Jo Catlett: Witch.
- Jennifer Darling: Pollywinkle.
- Michael Dorn: Clown.
- Jeff Doucette: Blort #2/Worm/Frog/Admission Ghoul/Imp.
- Robin Atkin Downes: Chocolate Sailor.
- Bill Fagerbakke: Clerk.
- Gilbert Gottfried: Santa Claus.
- Thom Adcox Hernandez: Nose/Nerd #2.
- Bob Joles: Ground Control/Cheese Puff Dealer/Mack/Mini Mart Employee/Uncle Chokey/Ulik/Druid #1/#2.
- Tom Kane: Professor Utonium.
- John Kassir: Lord Moldybutt.
- Josh Keaton: Driver.
- Wayne Knight: Jack O'Lantern.
- Clyde Kusatsu: Japanese Scientist/Japanese Business Guy.
- Mr. Lawrence
- Peter Lurie: Bunny/Alien/various.
- Andrea Martin: Monster Wife.
- Malcolm McDowell: Head Vampire.
- Richard McGonagle: Male Parent/Man/Father Time.
- Jim Meskimen: Chubby Employee.
- Masasa Moyo: Tanya.
- Phil Proctor: Cornea/Ogre.
- Jim Rash: Gatekeeper/Jefferson/Announcer.
- Peter Renaday: Abraham Lincoln/Atilla/Creature/Chocolate Sailor/Patron/Dr. Courage/Narrator.
- Neil Ross: Forest Ranger/Camper.
- Ronnie Schell: Toadblatt/Real State Agent.
- Cree Summer: Cave Witch.
- James Arnold Taylor: Fred Flintstone.
- Rip Taylor: Larry.
- Paula Tiso: Atrocia/Gregory.
- Joan Van Ark: Mandy #3/Wanda/Woman
- Voltaire: Brain-Eating Meteor (singing voice).
- Fred Willard: Boogey.
Films (Billy & Mandy's Big Boogey Adventure, Wrath of the Spider Queen and Underfist: Halloween Bash)
- Michael McKean: Kalgoron.
- Kari Wahlgren: Velma Green the Spider Queen.
Video game (The Grim Adventures of Billy & Mandy)
- Maurice LaMarche: Jack O'Lantern.
