Jessica D. Stone

Stanley (voice)

Charles Shaughnessy

Dennis (voice)

Ari Meyers

Mom (voice)

Hynden Walch

Elsie (voice)

Khylan Jones

Mimi / Marci (voice)

Hillary B. Smith

Paleontologist (voice)

Randy Quaid

Rockin' Rory (voice)

John Ritter

Great Uncle Stew (voice)

Jeff Buckland