Obsada i filmowcy

Freddie Highmore

Mary-Louise Parker

Nick Nolte

Sarah Bolger

David Strathairn

Arthur Spiderwick

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

Ron Perlman

Red Cap (voice) (uncredited)