Goosebumps 3: HorrorLand - Fan cast

. Finn Wolfhard as Jake

. Millie Bobby Brown as Ali

. Jack Black as R.L. Stine and the voice of Slappy the Dummy

. Joel McHale as the voice of Amaz-O

. Benedict Cumberbatch as the voice of Curly the Skeleton

. Michelle Gomez as Mrs. Maaargh

. Dan Fogler as Dr. Maniac

. Richard Goyle as Jonathan Chiller

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