Desperate for companionship, the repressed Willard befriends a group of rats that inhabit his late father's deteriorating mansion. In these furry creatures, Willard finds temporary refuge from daily abuse at the hands of his bedridden mother and his father's old partner, Frank. Soon it becomes clear that the brood of rodents is ready and willing to exact a vicious, deadly revenge on anyone who dares to bully their sensitive new master.
| Production | Bill Carraro | Executive Producer |
| Editing | James Coblentz | Editor |
| Sound | Shirley Walker | Original Music Composer |
| Writing | Glen Morgan | Screenplay |
| Production | Richard Brener | Executive Producer |
| Directing | Glen Morgan | Director |
| Production | Glen Morgan | Producer |
| Production | James Wong | Producer |
| Production | Toby Emmerich | Executive Producer |
| Camera | Robert McLachlan | Director of Photography |
| Art | Catherine Ircha | Art Direction |
| Costume & Make-Up | Gregory Mah | Costume Design |
| Art | Catherine Schroer | Assistant Art Director |
| Costume & Make-Up | Sandy Cooper | Makeup Artist |
| Visual Effects | Stuart Robertson | Visual Effects Supervisor |
| Production | Wendy O'Brien | Casting Associate |
| Costume & Make-Up | Laurie Giles | Assistant Costume Designer |
| Costume & Make-Up | Tanya Hudson | Makeup Artist |
| Art | Mark S. Freeborn | Production Design |
| Crew | Kosta Saric | Visual Effects Editor |
| Costume & Make-Up | John Quaglia | Hairstylist |
| Production | Heike Brandstatter | Casting |
| Visual Effects | Robin Griffin | Visual Effects Producer |
| Directing | Helga Ungurait | Script Supervisor |
| Production | Coreen Mayrs | Casting |
| Visual Effects | Daniel Robichaud | Animation Supervisor |
| Visual Effects | Bridgitte Krupke | Visual Effects Coordinator |
| Visual Effects | Kelly L'Estrange | Visual Effects Producer |
| Art | Mark Lane | Set Decoration |
| Sound | Thomas Milano | Music Editor |
| Visual Effects | Mandy Tankenson | Visual Effects Producer |
| Directing | Christine Lalande | Script Supervisor |
| Visual Effects | Tiffany Smith | Visual Effects Producer |
| Production | John Papsidera | Casting |
| Crew | Bob Comer | Special Effects Coordinator |
| Visual Effects | Greg Baxter | Visual Effects Coordinator |
| Visual Effects | Scott Edelstein | 3D Supervisor |
| Visual Effects | Cliff Mueller | Animation |
| Crew | Robert J. Scupp | Special Effects Coordinator |
| Camera | Douglas Curran | Still Photographer |
| Camera | Pierre Vinet | Still Photographer |
| Sound | Jon Title | Sound Designer |
| Camera | Casey Hotchkiss | Camera Operator |
| Sound | Dave McMoyler | Sound Designer |
| Camera | Bruce MacCallum | Camera Operator |
| Editing | George McCarthy | First Assistant Editor |
| Sound | Dave McMoyler | Supervising Sound Editor |
| Sound | Melissa Sherwood Hofmann | Sound Re-Recording Mixer |
| Sound | J. Stanley Johnston | Sound Re-Recording Mixer |
| Sound | Kelly Oxford | Sound Effects Editor |
| Sound | Scott Sanders | Sound Effects Editor |
| Camera | Tenzin Lhalungpa | Camera Operator |
| Sound | Kimaree Long | ADR Editor |
| Sound | Jeffrey Wilhoit | Foley Artist |
| Sound | Hector C. Gika | Foley Supervisor |
| Writing | Stephen Gilbert | Novel |
| Sound | Brian Basham | ADR Recordist |
| Sound | Nerses Gezalyan | Foley Mixer |
| Sound | James Moriana | Foley Artist |
| Writing | Gilbert Ralston | Original Film Writer |
| Sound | Tami Treadwell | ADR Recordist |
| Camera | Michael Wrinch | Second Unit Director of Photography |
| Sound | Frederick H. Stahly | Dialogue Editor |
| Sound | Michelle Pazer | Dialogue Editor |
| Crew | Bradley Parker | CG Supervisor |
| Crew | Rick Pearce | Stunt Double |
| Costume & Make-Up | Cheri Montesanto | Special Effects Makeup Artist |
| Directing | H.H. Cooper | First Assistant Director |
