Ron Perlman Red Cap (voice) (uncredited)
Mary-Louise Parker Helen Grace
Seth Rogen Hogsqueal (voice)
Andrew McCarthy Richard Grace
Freddie Highmore Jared Grace / Simon Grace
Nick Nolte Mulgarath
David Strathairn Arthur Spiderwick
Martin Short Thimbletack (voice)
Lyssa J. Caster Production Accountant
Sarah Bolger Mallory Grace
Christopher T. Welch Supervising ADR Editor, Supervising Dialogue Editor
Tyler Patrick Jones Additional Performer
Michèle St-Arnaud Location Manager
Takashi Seida Still Photographer
Hélène Lamarre Art Department Coordinator
James Horner Original Music Composer
Marie-Elaine Bailly Production Coordinator
Martine Giguère-Kazemirchuk Set Decoration
Joan Plowright Aunt Lucinda Spiderwick
Andy Nelson Sound Re-Recording Mixer
Gilbert Larose Jr. Stunts
Tom C. Peitzman Co-Producer
Mark Waters Director
Bob E. Krattiger Gaffer
David McKeown Stunt Coordinator
Karey Kirkpatrick Producer, Screenplay
Phil Tippett Animation Supervisor
Peter J. Silbermann Unit Publicist
James D. Bissell Production Design
Joey Box Stunt Coordinator
Brian Kalin O'Connell Character Designer
Jim Passon Color Timer
John Sayles Screenplay
Sarah Broshar Assistant Editor
Piero Mura Sound Effects Editor
Adrien Morot Special Effects Makeup Artist
Michael Kahn Editor
Michael Lantieri Special Effects Supervisor
Caleb Deschanel Director of Photography
Joanna Johnston Costume Design
Julie Feiner Dialogue Editor
Kevin Yagher Makeup Effects
Mark Mangini Sound Designer
Mariah Inger Nurse
Anna Behlmer Sound Re-Recording Mixer
Mark Binder Special Sound Effects
Josette Perrotta Co-Producer, Unit Production Manager
Robin D. Cook Local Casting
Ellen Goldsmith-Vein Producer
Sherry Hitch Digital Compositor
Louis Craig Special Effects Supervisor
Pablo Helman Visual Effects Supervisor
Mark Canton Producer
Jim Henrikson Music Editor
David Berenbaum Screenplay
Avram D. Gold Dialogue Editor
Ralph Osborn Dialogue Editor
Fred Berger Production Assistant
Réjean Goderre Key Hair Stylist
Patrick Crane First Assistant Editor
Nathalie Girard Stunts
Shawn Kelly Animation
Dick Bernstein Music Editor
Val Kuklowsky Dialogue Editor
Steve Rawlins Lead Animator
Martin Allan Kloner Visual Effects Editor
Tod Fennell Helen's Co-Worker
Kimi Webber Script Supervisor
Robert Stecko Camera Operator
Mark Coffey Assistant Sound Editor
Jordy Benattar Young Lucinda Spiderwick
Isabelle Guay Supervising Art Director