Slender Man is a 2018 American supernatural horror film directed by Sylvain White and written by David Birke, based on the character of the same name. The film stars Joey King, Julia Goldani Telles, Taylor Richardson, Jaz Sinclair, Annalise Basso, and Alex Fitzalan with Javier Botet as the title character.

Development of the film began in May 2016, with Birke being hired to write the script and much of the cast signing on a year later. Filming took place in the state of Massachusetts in June and July 2017.

Released in the United States on August 10, 2018, the film was poorly received by critics and audiences but was a modest box office success, grossing $51.7 million against a budget between $10‒28 million. For her performance, Sinclair was nominated for the Golden Raspberry Award for Worst Supporting Actress.