Jeremy Shada

Finn the Human (voice)

John DiMaggio

Jake the Dog (voice)

Tom Kenny

Ice King (voice)

Hynden Walch

Princess Bubblegum (voice)

Olivia Olson

Marceline the Vampire Queen (voice)

Isabella Acres

Young Princess Bubblegum (voice)

Polly Lou Livingston

Tree Trunks (voice)

Cole Sanchez

Party God (voice)

David Ferguson

Lifeguard (voice)

Pendleton Ward

Lumpy Space Princess (voice)

Kent Osborne

Bounce House Princess (voice)

Niki Yang

BMO / Lady Rainicorn (voice)

Ako Castuera

Canyon (voice)

Thurop Van Orman

Kent (voice)

Steve Little

Abracadaniel (voice)

Bert Youn

Lee (voice)

Paul Reubens

Gnome Ruler/Dancing Bug (voice)

Susie Essman

Acteur

Ron Lynch

Acteur

Brian Posehn

Acteur

Biz Markie

Acteur

Emo Philips

Cuber (voice)

Bobcat Goldthwait

Acteur

Billy West

Goose / Erik Adamkinson / Mayor (voice)

Ashly Burch

Breezy (voice)

Brian Doyle-Murray

Prince Huge (voice)

Alan Oppenheimer

Darren the Ancient Sleeper/Sun (voice)

Beau Billingslea

The Moon (voice)

Eric Bauza

Buttersotch Butler (voice)

Kyla Kowalewski

Me-Mow (voice)

Willow Smith

Beth (voice)

Ava Acres

Young Marceline (voice)

Sean Giambrone

Shermy (voice)

Brian Baumgartner

Georgy / Private (voice)

Toby Huss

Booboo / Commander (voice)

'Weird Al' Yankovic

Banana Man (voice)

James Urbaniak

Vice President Blowfish (voice)

George Takei

Ricardio (voice)

Andy Milonakis

Neptr (voice)

Andy Samberg

Party Pat / Rap Bear (voice)

Neil Patrick Harris

Prince Gumball (voice)

Hannibal Buress

Flame Prince (voice)

Donald Glover

Marshall Lee (voice)

Crispin Freeman

Turtle Prince (voice)

Grey DeLisle

Ice Queen (voice)

Peter Serafinowicz

Lumpy Space Prince (voice)

Madeleine Martin

Fionna (voice)

Elle Newlands

Butterscotch Butler (voice)

Matthew Broderick

Dream Warrior (voice)

Mark Hamill

Dark Magician (voice)

Laura Silverman

Ethel Rainicorn (voice)

Fred Stoller

Roy (voice)

John Hodgman

Elder Plops (voice)

Kate Micucci

Chips (voice)

Donald Faison

Princess Cookie (voice)

M. Emmet Walsh

Cosmic Owl (voice)

Kay Lenz

Bird Woman (voice)

Kevin Michael Richardson

The Storm (voice)

Kumail Nanjiani

Prismo (voice)

Lou Ferrigno

Billy (voice)

Maria Bamford

Manfried / Chocoberry / Candy Corn Girl (voice)

Henry Rollins

Bob Rainicorn (voice)

Mark Proksch

Johnnie (voice)

Justin Roiland

Earl of Lemongrab (voice)

Roz Ryan

Cake (voice)

Marc Maron

Squirrel (voice)

Kristen Schaal

Jake Jr (voice)

LeVar Burton

Bubble (voice)

Melissa Villaseñor

Clerk (voice)

Dan Mintz

Tv (voice)

Riki Lindhome

Ice Cream (voice)

Lucy Lawless

General Tarsal (voice)

Alia Shawkat

Betsy (voice)

Sharon Horgan

Minerva (voice)

Chelsea Peretti

Queen of Ooo (voice)

Jenny Slate

Huntress Wizard (voice)

Jackie Buscarino

Eclair Boy (voice)

Paul Scheer

Toronto (voice)

Dave Foley

Warren Ampersand (voice)

Felicia Day

Betty (voice)

James Baxter

James Baxter (voice)

Alan Tudyk

Chatsberry (voice)

Collin Dean

Tiffany (voice)

Creed Bratton

Phlannel Boxingday (voice)

Davey Johnson

Xergiok (voice)

Dee Bradley Baker

Mr. Cream Puff / Mr. Cupcake / Chet (voice)

J.G. Quintel

Blue Jay (voice)

John Moschitta Jr.

Key-per (voice)

Keith David

Balthus (voice)

Laraine Newman

Widow / Additional Voices (voice)

Lauren Lapkus

Patience St. Pim (voice)

Lennon Parham

Additional Voices (voice)

Livvy Stubenrauch

Young Kara (voice)

Martin Olson

Hunson Abadeer (voice)

Maurice LaMarche

Grand Master Wizard (voice)

Open Mike Eagle

Gingerbread Rapper / Rapper Chipmunk (voice)

Pamela Adlon

Gunther (voice)

Ron Perlman

The Lich (voice)

Sam Marin

Gareth / Flying Lettuce Brother (voice)

Stephen Root

Martin (voice)

Steve Agee

Ash (voice)

Steve Wolfhard

Slimy D (voice)

Zach King

Fizzbang (voice)