Hora de Aventura

Pendleton Ward

Lumpy Space Princess (voice)

Olivia Olson

Marceline the Vampire Queen (voice)

Jeremy Shada

Finn the Human (voice)

Hynden Walch

Princess Bubblegum (voice)

Niki Yang

BMO / Lady Rainicorn (voice)

Polly Lou Livingston

Tree Trunks (voice)

John DiMaggio

Jake the Dog (voice)

Tom Kenny

Ice King (voice)

Maria Bamford

Chocoberry / Slime Princess / Additional Voices

Steve Little

Peppermint Butler

John Kassir

Cloud Groom

Ron Perlman

The Lich

Kent Osborne

Joshua

Justin Roiland

Earl of Lemongrab

Isabella Acres

Young Princess Bubblegum

Ava Acres

Candy Girl / Candy Kids (voice) / Jamaica (voice) / Sunshine / Jamaica (voice) / Young Marceline (voice) / Young Marceline / Bunny Girl (voice)

Kumail Nanjiani

Prismo (voice)

Emo Philips

Cuber (voice)

Ashly Burch

Blacksmith / Scorpion (voice) / Breezy (voice) / Celina / Cheryl (voice) / Cheryl / Celina / Super Porp Mutant (voice)

Madeleine Martin

Fionna

Roz Ryan

Cake

Kristen Schaal

Jack Jr (voice) / Jake Jr (voice)

Dan Mintz

Tv (voice)

Andy Samberg

Party Pat / Party Pat / Rap Bear / Party Splat

"Weird Al" Yankovic

Banana Man

Neil Patrick Harris

Prince Gumball

Mark Hamill

Dark Magician (voice)

Henry Rollins

Bob Rainicorn / Cookie (voice)

M. Emmet Walsh

Cosmic Owl

Lou Ferrigno

Billy

Lauren Lapkus

Patience St. Pim (voice)

Kyla Rae Kowalewski

Me-Mow

Kate Micucci

Chips (voice) / Wendy

Kevin Michael Richardson

Donny / The Storm

James Urbaniak

Rat King / Leaf Beard / Vice President Blowfish

Thurop Van Orman

Kent / Tree Witch

George Takei

Ricardio

Donald Glover

Marshall Lee

Grey DeLisle

Ice Queen

Ako Castuera

Canyon

Laura Silverman

Ethel Rainicorn

Andy Milonakis

Neptr

John Hodgman

DJ Plop Drops / Elder Plops

Jackie Buscarino

Eclair Boy (voice) / Susan Strong / Kara / Additional Voices (voice)

Riki Lindhome

Ice Cream (voice) / Island Lady (voice)

Keith David

Balthus (voice) / Flame King (voice)

Sharon Horgan

Minerva (voice)

Jenny Slate

Huntress Wizard (voice)

Felicia Day

Betty (voice)

Maurice LaMarche

Grand Master Wizard (voice) / Wizard Police (voice)

Alan Tudyk

Chatsberry (voice)

Paul Reubens

Gnome Ruler/Dancing Bug (voice)

Billy West

Goose / Erik Adamkinson / Mayor (voice)

Brian Doyle-Murray

Prince Huge

Alan Oppenheimer

Darren the Ancient Sleeper/Sun (voice)

Beau Billingslea

The Moon (voice)

Eric Bauza

Buttersotch Butler (voice)

Willow Smith

Beth (voice)

Sean Giambrone

Shermy (voice)

Brian Baumgartner

Georgy / Private

Toby Huss

Booboo / Commander

David Ferguson

Lifeguard

Hannibal Buress

Flame Prince

Crispin Freeman

Turtle Prince

Peter Serafinowicz

Lumpy Space Prince

Elle Newlands

Butterscotch Butler

Matthew Broderick

Dream Warrior

Bert Youn

Lee

Fred Stoller

Roy

Donald Faison

Princess Cookie

Kay Lenz

Bird Woman

Dee Bradley Baker

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

Mark Proksch

Johnnie

Marc Maron

Squirrel

LeVar Burton

Bubble (voice)

Melissa Villaseñor

Clerk (voice)

Lucy Lawless

General Tarsal (voice)

Alia Shawkat

Betsy (voice)

Chelsea Peretti

Queen of Ooo (voice)

Paul Scheer

Toronto (voice)

Dave Foley

Warren Ampersand (voice)

James Baxter

James Baxter

J.G. Quintel

Blue Jay (voice)

John Moschitta Jr.

Key-per (voice)

Sam Marin

Gareth / Flying Lettuce Brother (voice)

Collin Dean

Tiffany (voice)

Cole Sanchez

Party God (voice)

Steve Agee

Ash (voice)

Martin Olson

Hunson Abadeer (voice)

Pamela Adlon

Gunther (voice)

Creed Bratton

Phlannel Boxingday (voice)

Open Mike Eagle

Gingerbread Rapper / Rapper Chipmunk (voice)

Stephen Root

Martin (voice)

Laraine Newman

Widow / Additional Voices (voice)

Lennon Parham

Additional Voices (voice)

Steve Wolfhard

Slimy D (voice)