Season 1

Kyle Massey

Milo (voice)

Chelsea Kane

Bea (voice)

Justin Roiland

Oscar (voice)

Dana Snyder

Mr. Baldwin (voice)

Alex Hirsch

Clamantha (voice)

Tommy Lister Jr.

Mr. Mussels (voice)

John DiMaggio

Jocktopus (voice)

Rachel Dratch

Esmargot (voice)

Atticus Shaffer

Albert Glass (voice)

Richard Simmons

Coach Salmons (voice)

Vanessa Marshall

Mouse (voice)

Kari Wahlgren

Shellsea / Snake (voice)

Derek Evanick

School Council (voice)