Peter is thrilled that his Grandpa is coming to live with his family. That is, until Grandpa moves into Peter's room, forcing him upstairs into the creepy attic. And though he loves his Grandpa, he wants his room back - so he has no choice but to declare war.
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| Camera | Greg Gardiner | Director of Photography |
| Sound | Aaron Zigman | Original Music Composer |
| Editing | Craig Herring | Editor |
| Production | Roe Baker | Casting Director |
| Costume & Make-Up | Christopher Hargadon | Costume Design |
| Production | Phillip Glasser | Producer |
| Directing | Tim Hill | Director |
| Writing | Tom J. Astle | Screenplay |
| Writing | Matt Ember | Screenplay |
| Editing | Peter S. Elliot | Editor |
| Art | John Collins | Production Design |
| Production | Guy Fieri | Executive Producer |
| Production | Marvin Peart | Producer |
| Writing | Robert Kimmel Smith | Novel |
| Production | Rosa Morris Peart | Producer |