Full Cast
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Seth Green
Milo (performance capture)
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Seth Robert Dusky
Milo (voice) (as Seth Dusky)
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Joan Cusack
Mom (voice)
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Dan Fogler
Gribble (voice)
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Breckin Meyer
Alien (voice)
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Elisabeth Harnois
Ki (voice)
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Tom Everett Scott
Milo's Dad (voice)
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Mindy Sterling
Supervisor (voice)
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Julene Renee
Martian (voice)
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Raymond Ochoa
Martian Hatchling (voice)
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Robert Ochoa
Martian Hatchling (voice)
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Ryan Ochoa
Martian Hatchling (voice)
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Amber Gainey Meade
Martian
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Dee Bradley Baker
Two-Cat (uncredited)
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Adam Jennings
Martian
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Aaron Rapke
Martian
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Jacquie Barnbrook
Martian
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Kevin Cahoon
Wingnut
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Kirsten Severson
Martian
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Matthew Henerson
Martian
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Stephen Kearin
Martian
