Madeleine Martin

Fionna (voice)

Roz Ryan

Cake (voice)

Ashly Burch

Huntress Wizard (voice)

Harvey Guillén

Gary (voice)

Iggy Craig

Casper (voice)

Jack Pendarvis

Dirt Beer Guy (voice)

Tom Kenny

Winter King (Simon Voice) (voice)

Elle Newlands

Beatrice Buttler / Van Driver (voice)

Dan Mintz

TV (voice)

John DiMaggio

Jake (voice)

Cristina Valenzuela

Additional Voices (voice)

Jim Cummings

Additional Voices (voice)

Felicia Day

Betty (voice)

Chelsea Peretti

Frozen Turkey (voice)

Olivia Olson

Marceline (voice)

Robbie Daymond

TV Announcer (voice)

Phil LaMarr

Goo Zombies / Dog Tourist / Tourist #4 (voice)

Donald Glover

Marshall Lee / Monster Marshall (voice)

Andrew Rannells

Gary Prince / Monster Gary (voice)

Audrey Bennett

Astrid (voice)

Jeff Bennett

Additional Voices (voice)

Brian David Gilbert

Winter King / Singing Banana Guard (voice)

Jenny Slate

Huntress (voice)

Erica Luttrell

Hana Abadeer (voice)

Marc Maron

Squirrel / Cheers Narrator (voice)

Stephen Root

Martin Mertens (voice)

Jinkx Monsoon

Lemoncarb #1 / Carla (voice)

Melissa Villaseñor

Candy Cuffs (voice)

Jeremy Shada

Farmworld Finn / Ice Finn (voice)

Ron Perlman

Lich (voice)

Tiffany Wu

Jay / Finn's Kid #2 (voice)

Dave McCormack

Orbo (voice)

Cree Summer

Lemoncarb #2 / Guard #1 (voice)

Sean Giambrone

Shermy (voice)

Imani Hakim

Beth (voice)

Eric Bauza

Peanut / Tromo / Tire Seller (voice)

Hynden Walch

Bonnie (voice)

James Kyson

Big Destiny / Handbag Helmet (voice)

Kayleigh McKee

Ashley (voice)

Vico Ortiz

Hunter (voice)

Pendleton Ward

Ellis P / Old Man Cake / Nerdy Alien (voice)

Niki Yang

Additional Voices (voice)

Grey DeLisle

Ice Cream Queen / Rink Attendant (voice)

Nia Castro

Bonnie (voice)

Kris Kollins

Marshall Lee (voice)

Maria Bamford

Starchy / Party Patty / Venusian Cherub # 1 (voice)

Sean Rohani

Karmic Worm / Giant Hamburger Mite / Vampire #1 (voice)

Steve Little

Sam / Enchiridion (voice)

Colleen Smith

Frankie / Lady Cutter (voice)

Dee Bradley Baker

The Heart of the Forest / Za'Baby (voice)

Crispin Freeman

Turbo Allen (voice)

Andy Daly

Kheirosiphon / Popcop (voice)

Erica Mendez

Skater #1 (voice)

Mace Montgomery Miskel

Pep (voice)

Matthew Broderick

Spirit Dream Warrior (voice)

Patti Harrison

Witch Wizard (voice)

Billy Brown

Vampire King / Clock Archer (voice)

Sharon Horgan

Additional Voices (voice)

Rosie Brand

Tree Wizard / Kirin (voice)

Cole Sanchez

Party God / Person 1 (voice)

Kumail Nanjiani

Prismo (voice)

Jessica DiCicco

Flame Princess (voice)

Will Pendarvis

DJ Slime / Clapper (voice)

Mickey Zacchilli

Little Destiny (voice)

Manny Jacinto

DJ Flame (voice)

Frank Collison

Cosmic Owl / Brother #1 (voice)

Rumi C. Jean-Louis

Young Marshall Lee (voice)

Joe Pera

Gordie (voice)

Thurop Van Orman

Wishy / Spider (voice)

Open Mike Eagle

Marshmallow Kid (voice)

Kent Osborne

Damon (voice)

Andy Merrill

Blade Wizard / Banana Guard #3 (voice)

Kerri Kenney

Old Lady Princess / MS. Cupcake / Lips Monster (voice)

Kari Wahlgren

Queen of Venus / Embolina (voice)

Gaby Moreno

Venus Cantrix (voice)

Anna Akana

Fennel / MG (voice)

Aleks Sennwald

Venus Cosmic (voice)

Hayden Ezzy

Fern (voice)

Martin Olson

Hunson Abadeer (voice)

Bex Taylor-Klaus

Blaine (voice)

Andy Milonakis

Neptr / Vampire #2 (voice)