Leonard Nimoy (voice)

El-Les / Computer (voice)

Stoick (voice) / Stoick / Berthel (voice) / Iron Mason / Berthel (voice) / Commander (voice)

Kraang (voice) / Kraang #1 / Kraang #2 / Evil Metalhead (voice) / Kraang #1 / Kraang #2 (voice) / Commander Grundch (voice) / Kraang / Man (voice) / Kraang #1 / Sewer Worker (voice) / Kraangdroid / Norman (voice) / Braah / Announcer / Slug Person (voice)

Brad Chiles (voice)

Rebel Leader (voice) / Rebel Leader / Metalbender Cop (voice)

Chemistro / Living Laser (voice) / Scientist Supreme / Drone 2 / Scanner Drone (voice) / Jimmy Woo (voice) / Scientist Supreme / Jimmy Woo / Living Laser / Balder (voice)

Vladimir (voice) / Detective Briggs (voice) / Ugly Dave (voice)

Teen Attendant / Henchman (voice)

Peter Hastings

Masseuse (voice) / Chip Braverton / Myles Kramer / Announcer (voice) / McQuaid / Young Aengus (voice) / Dayton Knight / Terrified Man (voice) / Rowan / Dr. Blum (voice) / Husband / Officer Mike (voice)

Donald Flum

Blaze

Hal Jordan / Amazo / Homeless Man (voice)

Hotel Guest

Seagull / Dead Parrot / Pigeon Cabbie (voice)