Cast
- Seth GreenMilo (performance capture)
- Seth Robert DuskyMilo (voice) (as Seth Dusky)
- Joan CusackMom (voice)
- Dan FoglerGribble (voice)
- Breckin MeyerAlien (voice)
- Elisabeth HarnoisKi (voice)
- Tom Everett ScottMilo's Dad (voice)
- Mindy SterlingSupervisor (voice)
- Julene ReneeMartian (voice)
- Raymond OchoaMartian Hatchling (voice)
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