Slender Man is an upcoming American supernatural horror film directed by Sylvain White and written by David Birke, based on the Creepypasta character created by Eric Knudsen. Slender Man is an upcoming American supernatural horror film directed by Sylvain White and written by Victor Surge (the pseudonym of creator Eric Knudsen), based on his Creepypasta character of the same name. The film stars Joey King, Julia Goldani Telles, Jaz Sinclair, Annalise Basso and Talitha Bateman, alongside Javier Botet as the titular monster. It will be released by Screen Gems on August 24, 2018. Terror strikes when five teenage girls in a small town perform a ritual to debunk the lore of a tall, thin, horrifying figure known as the Slender Man. They soon fear that the legend is true when one of them suddenly goes missing and Slender Man is coming for them next.