 | Katie Cassidy als Kelli Presley |
 | Michelle Trachtenberg als Melissa |
 | Lacey Chabert als Dana |
 | Kristen Cloke als Leigh Colvin |
 | Mary Elizabeth Winstead als Heather Fitzgerald |
 | Andrea Martin als Barbara 'Ms. Mac' MacHenry |
 | Yan-Kay Crystal Lowe als Lauren Hannon |
 | Oliver Hudson als Kyle Autry |
 | Karin Konoval als Billy's Mother |
 | Dean Friss als Agnes - 16 & 22 Years |
 | Robert Mann als Billy Lenz - 20 & 35 Years |
 | Jessica Harmon als Megan Helms |
 | Leela Savasta als Clair Crosby |
| Kathleen Kole als Eve Agnew |
 | Cainan Wiebe als Billy Lenz - 5 & 12 Years |
| Christina Crivici als Agnes - 8 Years |
 | Howard Siegel als Lover / Stepfather |
| Peter Wilds als Frank Lenz |
 | Ron Selmour als Security Guard |
 | Michael Adamthwaite als Santa |
 | Peter New als Sanitarium Orderly |
 | Christian Sloan als Richard Steinmetz |
 | Alycia Purrott als Candy Striper |
 | Juan Riedinger als Morgue Attendant |
 | Aaron Pearl als Bludworth |
| Peggy Logan als Nurse |
 | Jill Teed als News Reporter |
 | Peggy Jo Jacobs als Weathergirl |
 | Jerry Wasserman als Medical Examiner |
| Derek McIver als Orderly |
| Evan Adams als Doctor |
 | Jody Racicot als Attendant |
 | Anne Marie DeLuise als Kelli's Mother |
 | Greg Kean als Kelli's Father |
| Kent Kubena als Reindeer |
| Wendy Buss als Security (uncredited) |
| Glen Morgan | Director |
| Roy Moore | Author |
| Shirley Walker | Original Music Composer |
| Robert McLachlan | Director of Photography |
| Chris G. Willingham | Editor |
| James Bamford | Stunts |
| Marty Adelstein | Producer |
| Marc Butan | Executive Producer |
| Bob Clark | Executive Producer |
| Mark Cuban | Executive Producer |
| Steven Hoban | Producer |
| Glen Morgan | Producer |
| Scott Nemes | Executive Producer |
| Dawn Olmstead | Producer |
| Noah Segal | Executive Producer |
| Victor Solnicki | Producer |
| Todd Wagner | Executive Producer |
| John Papsidera | Casting |
| Mark S. Freeborn | Production Design |
| Tony Wohlgemuth | Art Direction |
| Mark Lane | Set Decoration |
| Gregory Mah | Costume Design |
| Glen Morgan | Screenplay |
| Dino DiMuro | Sound Effects Editor |
| Dave McMoyler | Supervising Sound Editor |
| Jon Title | Sound Effects Editor |
| Tim Walston | Sound Designer |
| Michael Kowalski | Visual Effects Supervisor |
| Allan Magled | Visual Effects Supervisor |
| James Tichenor | Visual Effects Supervisor |
| James Wong | Producer |
| Marny Eng | Stunt Double |
| Crystal Dalman | Stunts |
| Kent Kubena | Co-Producer |
| Ogden Gavanski | Co-Producer |
| Krista Bell | Stunts |
| Richard Brooks | Stunts |
| Laura Lee Connery | Stunts |
| Jennifer Mylrea | Stunt Double |
| Kirk Caouette | Stunts |
| Dustin Brooks | Stunts |
| David Jacox | Stunts |
| Danny Hospes | Stunts |
| Sharon Simms | Stunts |
| Jon Kralt | Stunt Double |
| Tony Morelli | Stunts |
| Rob Hayter | Stunt Double |
| Anna Mercedes Morris | Stunt Double |
| Duane Dickinson | Stunts |
| Dave Hospes | Stunt Coordinator |
| Chris Devitt | Special Effects Makeup Artist |
| Paul Edwards | Key Hair Stylist |
| Geoff Redknap | Special Effects Makeup Artist |
| Jack Hardy | First Assistant Director |
| Roger Scott Russell | Second Assistant Director |
| Katharina Brand | Set Decoration Buyer |
| Nancy Ford | Assistant Art Director |
| David Hadaway | Set Designer |
| Catherine Ircha | Set Designer |
| Michelle Pitney | Set Decoration Buyer |
| Nerses Gezalyan | Foley Mixer |
| Nerses Gezalyan | Sound Mixer |
| J. Stanley Johnston | Sound Re-Recording Mixer |
| James Moriana | Foley Artist |
| Patrick Ramsay | Sound Mixer |
| Jamie Ritharom-Umbras | Sound Editor |
| Melissa Sherwood Hofmann | Sound Re-Recording Mixer |
| Jeffrey Wilhoit | Foley Artist |
| Terry Hutcheson | Visual Effects Producer |
| Matthew Lynch | Visual Effects Producer |
| Paul Lavigne | Costume Set Supervisor |
| Bruce Worrall | Second Unit Director of Photography |
| Peter Wilke | Steadicam Operator |
| Matt Margolis | Grip |
| Burton 'Joe' Kuchera | Gaffer |
| Jason Dryden | Grip |
