Brendan Fraser

Trevor Anderson

Josh Hutcherson

Sean Anderson

Anita Briem

Hannah Ásgeirsson

Seth Meyers

Professor Alan Kitzens

Jean Michel Paré

Max Anderson

Jane Wheeler

Elizabeth Anderson

Frank Fontaine

Old Man

Giancarlo Caltabiano

Leonard

Kaniehtiio Horn

Gum-Chewing Girl

Garth Gilker

Sigurbjörn Ásgeirsson

Frank Welker

Giganotosaurus (voice) (uncredited)