Upon moving into the run-down Spiderwick Estate with their mother, twin brothers Jared and Simon Grace, along with their sister Mallory, find themselves pulled into an alternate world full of faeries and other creatures.
Jared Grace / Simon Grace
Freddie Highmore
Mallory Grace
Sarah Bolger
Arthur Spiderwick
David Strathairn
Helen Grace
Mary-Louise Parker
Mulgarath
Nick Nolte
Aunt Lucinda Spiderwick
Joan Plowright
Richard Grace
Andrew McCarthy
Hogsqueal (voice)
Seth Rogen
Thimbletack (voice)
Martin Short
Young Lucinda Spiderwick
Jordy Benattar
Mrs. Spiderwick
Lise Durocher-Viens
Helen's Co-Worker
Tod Fennell
Nurse
Mariah Inger
Tow Truck Driver
Jeremy Lavalley
Additional Performer
Kyle Switzer
Additional Performer
Tyler Patrick Jones
Red Cap (voice) (uncredited)
Ron Perlman