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Seth Green - Milo (performance capture)Seth Robert Dusky - Milo (voice) (as Seth Dusky)Joan Cusack - Mom (voice)Dan Fogler - Gribble (voice)Breckin Meyer - Alien (voice)Elisabeth Harnois - Ki (voice)Tom Everett Scott - Milo's Dad (voice)Mindy Sterling - Supervisor (voice)Julene Renee - Martian (voice)Raymond Ochoa - Martian Hatchling (voice)Robert Ochoa - Martian Hatchling (voice)Ryan Ochoa - Martian Hatchling (voice)Amber Gainey Meade - MartianDee Bradley Baker - Two-Cat (uncredited)Adam Jennings - MartianAaron Rapke - MartianJacquie Barnbrook - MartianKevin Cahoon - WingnutKirsten Severson - MartianMatthew Henerson - MartianStephen Kearin - Martian
Ratings
from TMDB6.0/ 10829 votes