James Woods

Gloomius Maximus (voice)

Kyle Fairlie

Spaceboy / Young Dad (voice)

Joshua Tucci

Billy Bevel (voice)

Kristen Bone

Zowie (voice)

Cole Caplan

Olie (voice)

Rob Smith

Spot / Spacedog (voice)

Catherine Disher

Mom / TV Journalist (voice)

Rebecca Brenner

Pollie Pi (voice)

Noah Reid

Screwy (voice)

Al Mukaddam

Wheelie (voice)

Len Carlson

Pappy / TV Announcer (voice)

Adrian Truss

Dad / Gizmo (voice)

Michael Cera

Young Gizmo (voice)

Paul Haddad

Willy Jollie (voice)

Juan Chioran

Wally Jollie (voice)

Neil Crone

Doctor Geary (voice)

Philip Williams

Baxter (voice)

Ellen-Ray Hennessy

Bonita (voice)

Sunday Muse

Binky (voice)

Jake Goldsbie

Junior Littlegreen (voice)