Ron Perlman Red Cap (voice) (uncredited)
Seth Rogen Hogsqueal (voice)
Mary-Louise Parker Helen Grace
Freddie Highmore Jared Grace / Simon Grace
David Strathairn Arthur Spiderwick
Andrew McCarthy Richard Grace
Nick Nolte Mulgarath
Martin Short Thimbletack (voice)
Sarah Bolger Mallory Grace
James Horner Original Music Composer
Larry Franco Producer
Andy Nelson Sound Re-Recording Mixer
Joan Plowright Aunt Lucinda Spiderwick
Caleb Deschanel Director of Photography
Mark Waters Director
Phil Tippett Animation Supervisor
Jim Passon Color Timer
Karey Kirkpatrick Producer, Screenplay
Joey Box Stunt Coordinator
Adrien Morot Special Effects Makeup Artist
Tyler Patrick Jones Additional Performer
John Sayles Screenplay
Mark Mangini Sound Designer
Fred Berger Production Assistant
Anna Behlmer Sound Re-Recording Mixer
Pablo Helman Visual Effects Supervisor
Michael Kahn Editor
Mark Canton Producer
Joanna Johnston Costume Design
Nathalie Girard Stunts
Robin D. Cook Local Casting
James D. Bissell Production Design
Mariah Inger Nurse
Christopher T. Welch Supervising ADR Editor, Supervising Dialogue Editor
Josette Perrotta Co-Producer, Unit Production Manager
Bob E. Krattiger Gaffer
Kevin Yagher Makeup Effects
Michael Lantieri Special Effects Supervisor
Tim Alexander Visual Effects Supervisor
Dick Bernstein Music Editor
David Berenbaum Screenplay
Sarah Broshar Assistant Editor
Avram D. Gold Dialogue Editor
Christa Munro Art Direction
Alain Brochu Head Carpenter
Louis Craig Special Effects Supervisor
Steve Barnett Co-Producer
Martin Allan Kloner Visual Effects Editor
Kimi Webber Script Supervisor
Andy Sisul First Assistant Sound Editor
Tom C. Peitzman Co-Producer
Mark Coffey Assistant Sound Editor
Tod Fennell Helen's Co-Worker
Isabelle Guay Supervising Art Director
Jordy Benattar Young Lucinda Spiderwick
Francois Archambault Steadicam Operator, Camera Operator
Jim Henrikson Music Editor
Annick Chartier Makeup Department Head
Julie Feiner Dialogue Editor
Lucie Tremblay Set Designer
Peter J. Silbermann Unit Publicist
David McKeown Stunt Coordinator
Ralph Osborn Dialogue Editor
Satish Ratakonda Compositor
Piero Mura Sound Effects Editor
Bruno Gatien Special Effects Makeup Artist
Réjean Goderre Key Hair Stylist
Ben Rosenblatt Post Production Supervisor
Martine Giguère-Kazemirchuk Set Decoration
Alan Howarth Special Sound Effects
Robert Stecko Camera Operator
Philippe Lord Set Decoration