Jack Corbett
Billy 5000 (voice)
Grace Kuhlenschmidt
Freckles (voice)
Elsie Fisher
Beatbox (voice)
Janeane Garofalo
Dr. Dolphin (voice)
Miya Folick
Rosario 'Rozebud' Dolphin (voice)
Tavi Gevinson
Glarba (voice)
Julio Torres
T-Bone / Gas Station Guy / Brontosaurus (voice)
Sarah Sherman
Miss Sharon / Minivan Mom (voice)
Chris Fleming
Weenie (voice)
Cole Escola
Ol' Slippy / Nan (voice)
Joe Pera
Herschel Cretaceous (voice)
River L. Ramirez
Gordon Spaghetti / Fettuccini Enthusiast / Paramedic / Minivan Baby (voice)
Demi Adejuyigbe
Mr. Moolah (voice)
Eva Victor
Gail 5000 (voice)
