Kiefer O'Reilly
Howard Lovecraft (Voice)
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Jeffrey Combs
H.P. Lovecraft (voice)
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Tyler Nicol
Winfield Lovecraft (voice)
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Michelle O'Reilly
Sarah Lovecraft (voice)
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Sean Patrick O'Reilly
Spot / Cthulhu (voice)
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Alison Wandzura
Mary Lovecraft (voice)
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Mark Hamill
Dr. Henry Armitage (voice)
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Vijary Vaibhav Saini
Professor Jaswant Atwood (voice)
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Ashleigh Ball
Ellen Ellery (voice)
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Scott McNeil
Hamish Rice / Govlins (voice)
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Nick Wolfhard
William Dyer (voice)
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Christopher Plummer
Dr. Jeffrey West (voice)
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Finn Wolfhard
Herbert West (voice)
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Doug Bradley
Nyarlathotep (voice)
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Summer O'Reilly
Gotha (voice)
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Harmony O'Reilly
Innes (voice)
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Phoenix O'Reilly
Twi'i (voice)
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