Kiefer O'Reilly

Howard Lovecraft (Voice)

Jeffrey Combs

H.P. Lovecraft (voice)

Sean Patrick O'Reilly

Spot / Cthulhu (voice)

Alison Wandzura

Mary Lovecraft (voice)

Mark Hamill

Dr. Henry Armitage (voice)

Ashleigh Ball

Ellen Ellery (voice)

Scott McNeil

Hamish Rice / Govlins (voice)

Nick Wolfhard

William Dyer (voice)

Christopher Plummer

Dr. Jeffrey West (voice)

Finn Wolfhard

Herbert West (voice)

Doug Bradley

Nyarlathotep (voice)