Star Butterfly

Eden Sher

Marco Diaz

Adam McArthur

Ludo/King Butterfly

Alan Tudyk

Mrs. Diaz (voice) / Angie Diaz (voice)

Nia Vardalos

Queen Moon Butterfly (voice) / Jackie Lynn Thomas (voice) / Queen Moon (voice)

Grey DeLisle

Mr. Diaz

Artt Butler

Buff Frog (voice) / Talon Raventalon (voice) / Buff Frog

Fred Tatasciore

Ferguson

Nate Torrence

Janna Ordonia (voice) / Porcupine Monster (voice)

Abby Elliott

Pony Head (voice)

Jenny Slate

Miss Skullnick (voice)

Dee Dee Rescher

Tom Lucitor (voice)

Rider Strong

Eclipsa (voice)

Esmé Bianco

Principal Skeeves (voice) / Bearicorn (voice) / Gemini

Jeff Bennett

Tamia Cerrate

Hekapoo (voice)

Zosia Mamet

Bald Eagle / Giant Spider (voice) / Additional Voices (voice)

Dee Bradley Baker

Additional Voices (voice) / StarFan13 (voice) / Sabrina (voice)

Daron Nefcy

Conjoinican (voice) / Quirky Guy (voice) / Additional Voices (voice)

Mark Gagliardi

Glossaryck (voice)

Jeffrey Tambor

Manfred

Jonny Rees

Rhombulus (voice) / Rhombulus / Additional Voices (voice)

Kevin Michael Richardson

Nicole Byer

Kelly (voice) / Kelly / Kelly's Mom

Dana Davis

Toffee (voice)

Michael C. Hall

Oskar Greason (voice)

Jon Heder

Glossaryck (voice)

Keith David

Cloudy (voice) / Additional Voices (voice) / Cloudy

Eric Bauza

Meteora Heinous (voice) / Miss Heinous (voice)

Jessica Walter

Juliana Hansen

Mina Loveberry (voice) / Lydia (voice)

Amy Sedaris

Omnitraxus Prime (voice)

Carl Weathers

Katrina (voice) / Additional Voices

Kimaya Thais

Alfonzo (voice)

Matt Chapman

Sensei (voice)

Nick Swardson

Foolduke (voice) / Snail (voice)

Natalie Palamides

Ruberiot (voice)

Patrick Stump

Seahorse (voice)

Eddie Perino

Lord Brudo (voice) / Dogbull (voice) / Sea Serpent (voice)

John DiMaggio

Director

Dave Wasson

Director

Daron Nefcy

Director

Dominic Bisignano

Director

Michael Mullen