An upcoming 3-D computer-animated sci-fi film based on the book by Berkeley Breathed, featuring the voice cast of Seth Green, Joan Cusack, Elisabeth Harnois, Dan Fogler, and Mindy Sterling. The film is being created using performance capture, which Warner Bros. also used to complete The Polar Express.
The story follows a rebellious 9-year-old boy named Milo, who is just beginning summer. His mother gives him chores and tasks like weeding the garden or eating his vegetables. But after Milo tints his 5-year-old sister’s face purple, his mother sees no humor in this and sends him to his room. After a heated argument with his mother in which Milo says “I don't see what’s so special about mothers!”, Milo is grounded for the rest of the summer. After falling asleep, Milo does not hear the rumble of the rocket landing outside. After, Martians enter Milo's house and take away his mother, Milo realizes that he has to rescue her.