Fionna Campbell (voice)

Madeleine Martin

Cake (voice)

Roz Ryan

Simon Petrikov / Ice King (voice)

Tom Kenny

Additional Voices (voice) / Reindeer Boy Boss / Farmworld Chet

Dee Bradley Baker

Scarab (voice) / Scarab / Ashley (voice)

Kayleigh McKee

Marshall Lee (voice) / Marshall Lee / Monster Marshall (voice)

Donald Glover

Gary Prince (voice) / Gary Prince / Monster Gary (voice)

Andrew Rannells

Farmworld Finn / Ice Finn (voice) / Finn (voice)

Jeremy Shada

Ellis P (voice) / LSP / Ellis P

Pendleton Ward

Additional Voices (voice) / Normulon / Lemongrab (voice)

Jinkx Monsoon

Astrid (voice) / Young Marceline / Young Marceline (voice)

Audrey Bennett

Farmworld Mom / Wildberry / Finn's Kid #1 (voice)

Maria Bamford

Evil Choose Goose (voice) / Choose Bruce / Earmworld Dad (voice)

Jeff Bennett

Additional Voices (voice) / Skater Fairies (voice) / Ice Scout #2 (voice)

Cristina Valenzuela

Additional Voices (voice) / Skater Fairies (voice) / Ice Scout #1 (voice)

Erica Mendez

Additional Voices (voice) / Lemoncarb #2 (voice)

Cree Summer

Betty (voice)

Felicia Day

Bonnie (voice) / Princess Bubblegum / Child Wizard

Hynden Walch

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

Phil LaMarr

Hunter / Fern (voice) / Skater Y (voice)

Vico Ortiz

Queenie (voice)

Chelsea Peretti

Marceline (voice)

Olivia Olson

Jake (voice)

John DiMaggio

Additional Voices (voice)

Sharon Horgan

BMO / Library Person (voice) / Additional Voices (voice)

Niki Yang

Ice Prince / TV Announcer / Bar Guy (voice)

Robbie Daymond

Additional Voices (voice) / Ice Cream Queen / Rink Attendant (voice)

Grey DeLisle

Squirrel (voice) / Additional Voices (voice)

Marc Maron

Kheirosiphon / Wyatt (voice) / Popcop (voice)

Andrew Daly

Candy Cuffs (voice) / Babette / Heckler #1 (voice)

Melissa Villaseñor

Additional Voices (voice)

Steve Little

Moderator / Heckler #2 (voice) / Additional Voices (voice)

Cole Sanchez

Little Destiny (voice) / Additional Voices (voice)

Mickey Zacchilli

Lich (voice)

Ron Perlman

Jay / Finn's Kid #2 (voice) / Additional Voices (voice)

Tiffany Wu

Shermy (voice)

Sean Giambrone

Beth (voice)

Imani Hakim

Beatrice Buttler / Van Driver (voice)

Elle Newlands

TV (voice)

Dan Mintz

Dirt Beer Guy (voice)

Jack Pendarvis

Additional Voices (voice)

Jim Cummings

Peanut / Tromo / Tire Seller (voice)

Eric Bauza

Big Destiny / Handbag Helmet (voice)

James Kyson

Winter King / Singing Banana Guard (voice)

Brian David Gilbert

Huntress (voice)

Jenny Slate

Hana Abadeer (voice)

Erica Luttrell

Martin Mertens (voice)

Stephen Root

Vampire King (voice)

Billy Brown

Orbo (voice)

Dave McCormack

Casper (voice)

Iggy Craig

Nova (voice)

Rosie Brand

Bonnie (voice)

Nia Castro

Prismo (voice) / Prismo (1

Sean Rohani