Grimsburg

Jon Hamm

Marvin Flute (voice)

Erinn Hayes

Harmony Flute (voice)

Rachel Dratch

Stan Flute (voice)

Alan Tudyk

Dr. Rufis Pentos / Mr. Flesh (voice)

Kevin Michael Richardson

Detective Greg Summers (voice)

Greg Chun

Lieutenant John Kang (voice)

Martin Short

Otis Volcanowitz (voice)

Kaniehtiio Horn

Wynona Whitecloud (voice)

Wendi McLendon-Covey

Chief Patsy Stamos (voice)

Cree Summer

(voice)

JP Karliak

(voice)

Chadd Gindin

(voice)

Piotr Michael

(voice)

Brian Jordan Alvarez

(voice)

Rob Huebel

Bertram (voice)

Ronny Chieng

(voice)

Debi Derryberry

(voice)

Andrés du Bouchet

(voice)