All Cast
Freddie Highmore
Jared Grace / Simon Grace
Sarah Bolger
Mallory Grace
David Strathairn
Arthur Spiderwick
Mary-Louise Parker
Helen Grace
Nick Nolte
Mulgarath
Joan Plowright
Aunt Lucinda Spiderwick
Andrew McCarthy
Richard Grace
Seth Rogen
Hogsqueal (voice)
Martin Short
Thimbletack (voice)
Jordy Benattar
Young Lucinda Spiderwick
Lise Durocher-Viens
Mrs. Spiderwick
Tod Fennell
Helen's Co-Worker
Mariah Inger
Nurse
Jeremy Lavalley
Tow Truck Driver
Kyle Switzer
Additional Performer
Tyler Patrick Jones
Additional Performer
