Seth Rogen Hogsqueal (voice)
Freddie Highmore Jared Grace / Simon Grace
Ron Perlman Red Cap (voice) (uncredited)
Andrew McCarthy Richard Grace
David Strathairn Arthur Spiderwick
Mary-Louise Parker Helen Grace
Nick Nolte Mulgarath
Sarah Bolger Mallory Grace
Martin Short Thimbletack (voice)
Mark Waters Director
Joan Plowright Aunt Lucinda Spiderwick
James Horner Original Music Composer
John Sayles Screenplay
Phil Tippett Animation Supervisor
Robin D. Cook Local Casting
Karey Kirkpatrick Producer, Screenplay
Mariah Inger Nurse
Carlos Huante Character Designer
Josette Perrotta Co-Producer, Unit Production Manager
Andy Nelson Sound Re-Recording Mixer
Kevin Yagher Makeup Effects
David Berenbaum Screenplay
Tyler Patrick Jones Additional Performer
Avram D. Gold Dialogue Editor
Caleb Deschanel Director of Photography
Jim Passon Color Timer
Joey Box Stunt Coordinator
Michael Kahn Editor
Ellen Goldsmith-Vein Producer
Tod Fennell Helen's Co-Worker
Anna Behlmer Sound Re-Recording Mixer
Jordy Benattar Young Lucinda Spiderwick
Bob E. Krattiger Gaffer
James D. Bissell Production Design
Adrien Morot Special Effects Makeup Artist
Larry Franco Producer
Bethan Mowat Second Assistant Director
Kristen Millette Compositor
Christopher T. Welch Supervising ADR Editor, Supervising Dialogue Editor
Geralyn Flood Casting Associate
Martin Allan Kloner Visual Effects Editor
Michael Lantieri Special Effects Supervisor
Peter J. Silbermann Unit Publicist
Mark Canton Producer
Ben Rosenblatt Post Production Supervisor
Mickael Coedel Animation
Jean-Pierre Paquet Art Direction
Brian Kalin O'Connell Character Designer
Joanna Johnston Costume Design
Nathalie Girard Stunts
Fred Berger Production Assistant
Michèle St-Arnaud Location Manager
Tom C. Peitzman Co-Producer
Marci Liroff Casting
Louis Craig Special Effects Supervisor
Julie Feiner Dialogue Editor
Gilbert Larose Jr. Stunts
Pablo Helman Visual Effects Supervisor
Steve Rawlins Lead Animator
Alain Brochu Head Carpenter
Odette Gadoury Costume Design
Réjean Goderre Key Hair Stylist
Jim Kontos Unit Manager
Tim Alexander Visual Effects Supervisor
Jim Henrikson Music Editor
Alan Howarth Special Sound Effects
Martine Giguère-Kazemirchuk Set Decoration
Louis Marion Sound Mixer
Isabelle Guay Supervising Art Director
Tony DiTerlizzi Executive Producer, Book
Mark Mangini Sound Designer
Robert Stecko Camera Operator