Adventure Time: Fionna & Cake (TV) Cast
The cast of Adventure Time: Fionna & Cake. Updated on August 17, 2025.
54 actors
Madeleine Martin
as Fionna Campbell (voice) (10 episodes)

Madeleine Martin lends her voice to the character of Fionna, the female counterpart to the show's main protagonist, Finn. Fionna is a fearless and adventurous young girl who embarks on various quests and adventures in the Land of Ooo alongside her trusty companion Cake. Madeleine Martin brings Fionna to life with her expressive and engaging voice acting skills, capturing both the character's bravery and vulnerability.

Roz Ryan
as Cake (voice) (10 episodes)

Roz Ryan provides her voice for the character of Cake, Fionna's talking and shape-shifting cat companion. Cake is a mischievous and sarcastic character who adds humor and levity to the show. With her versatile vocal range, Roz Ryan skillfully portrays Cake's witty and sassy personality, creating a delightful and entertaining character that audiences have come to love.

Tom Kenny
as Simon Petrikov / Ice King (voice) (10 episodes)

Tom Kenny brings his talents to the role of Ice King, a quirky and somewhat lonely antagonist in Adventure Time: Fionna & Cake. As the ruler of the Ice Kingdom, Ice King possesses ice and snow powers, often using them in his misguided attempts to capture a princess. Tom Kenny's versatile voice acting skills bring depth and complexity to the character, showcasing Ice King's eccentricities and occasional moments of vulnerability.

Chelsea Peretti
as Queenie (voice) (2 episodes)
Elle Newlands
as Beatrice Buttler / Van Driver (voice) (1 episode)
Olivia Olson
as Marceline (voice) (2 episodes)
Dan Mintz
as TV (voice) (1 episode)
Jack Pendarvis
as Dirt Beer Guy (voice) (1 episode)
John DiMaggio
as Jake (voice) (2 episodes)
Erica Mendez
as Ice Scout #1 (voice) (1 episode)
Cristina Valenzuela
as Ice Scout #2 (voice) (1 episode)
Cree Summer
as Additional Voices (voice) (2 episodes)
Jinkx Monsoon
as Additional Voices (voice) (2 episodes)
Jim Cummings
as Additional Voices (voice) (1 episode)
Audrey Bennett
as Astrid (voice) (2 episodes)
Sharon Horgan
as Additional Voices (voice) (2 episodes)
Maria Bamford
as Additional Voices (voice) (1 episode)
Felicia Day
as Betty (voice) (3 episodes)
Niki Yang
as BMO / Library Person (voice) (1 episode)
Sean Rohani
as Prismo (voice) (4 episodes)
Robbie Daymond
as Ice Prince / TV Announcer / Bar Guy (voice) (1 episode)
Hynden Walch
as Bonnie (voice) (1 episode)
Eric Bauza
as Peanut / Tromo / Tire Seller (voice) (1 episode)
James Kyson
as Big Destiny / Handbag Helmet (voice) (1 episode)
Dee Bradley Baker
as Additional Voices (voice) (2 episodes)
Jeremy Shada
as Farmworld Finn / Ice Finn (voice) (1 episode)
Phil LaMarr
as Dog Cake / Nightmare Cake / Beard Guy (voice) (1 episode)
Donald Glover
as Marshall Lee (voice) (5 episodes)
Jeff Bennett
as Evil Choose Goose (voice) (2 episodes)
Nía Castro
as Bonnie (voice) (1 episode)
Andrew Rannells
as Gary Prince (voice) (5 episodes)
Pendleton Ward
as Ellis P (voice) (2 episodes)
Brian David Gilbert
as Winter King / Singing Banana Guard (voice) (1 episode)
Vico Ortiz
as Hunter / Skater Y (voice) (1 episode)
Grey DeLisle
as Additional Voices (voice) (1 episode)
Marc Maron
as Additional Voices (voice) (1 episode)
Jenny Slate
as Huntress (voice) (1 episode)
Andy Daly
as Kheirosiphon / Popcop (voice) (1 episode)
Erica Luttrell
as Hana Abadeer (voice) (1 episode)
Stephen Root
as Martin Mertens (voice) (1 episode)
Melissa Villaseñor
as Babette / Heckler #1 (voice) (1 episode)
Billy Brown
as Vampire King (voice) (1 episode)
Kayleigh McKee
as Scarab (voice) (4 episodes)
Steve Little
as Additional Voices (voice) (2 episodes)
Cole Sanchez
as Moderator / Heckler #2 (voice) (1 episode)
Mickey Zacchilli
as Additional Voices (voice) (1 episode)
Ron Perlman
as Lich (voice) (2 episodes)
Tiffany Wu
as Jay / Finn's Kid #2 (voice) (1 episode)
Dave McCormack
as Orbo (voice) (1 episode)
Sean Giambrone
as Shermy (voice) (2 episodes)
Imani Hakim
as Beth (voice) (2 episodes)
Iggy Craig
as Casper (voice) (1 episode)
Rosie Brand
as Nova (voice) (1 episode)
Nia Castro
as Bonnie (voice) (1 episode)
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