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Beware the Slenderman (2016)

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Tells the story of two 12-year old girls, who attempted to murder one of their friends in an attempt to appease Slenderman, a fictional monster from a horror website.
1 win & 4 nominations. See more awards »



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Cast overview, first billed only:
Morgan Geyser Morgan Geyser ... Herself - Stabbing Suspect
Anissa Weier Anissa Weier ... Herself - Stabbing Suspect
Angie Geyser Angie Geyser ... Herself - Morgan's Mother
Bill Weier Bill Weier ... Himself - Anissa's Father
Michael O. Bohren Michael O. Bohren ... Himself - Judge
Michelle Trussoni Michelle Trussoni ... Herself - City of Waukesha Police Department
Kristi Weier Kristi Weier ... Herself - Anissa's Mother
Payton Leutner Payton Leutner ... Herself - Stabbing Victim (archive footage)
Trevor J. Blank Trevor J. Blank ... Himself - Digital Folklorist
Brad Kim Brad Kim ... Himself - KnowYourMeme.com
Richard Dawkins ... Himself - Evolutionary Biologist
Jack Zipes Jack Zipes ... Himself - Literary Critic
Tom Haynes Tom Haynes ... Himself - Anissa's Former Teacher
Abigail Baird Abigail Baird ... Herself - Neurodevelopmental Psychologist
Tyler Tyler ... Himself - Former Fellow Inmate


Lurking in the shadows of the Internet, a faceless modern-day bogeyman has attracted the attention and fear of a young generation who whisper his name online. Slenderman lives on the dark pages of the web, where impressionable youth create and cultivate his mythos in message boards, YouTube clips and various other digital incantations. But the online fairy tale becomes a shocking real-life horror as two 12-year-old girls, guided by their devotion to Slenderman, lure their friend into the woods to attempt a seemingly inexplicable, brutal murder. From the depths of one the Internet's most unsettling creations to the court case that must consider the consequences, Beware the Slenderman brings to light questions of accountability in an age where young, growing minds are only a few clicks away from creating and consuming something that may influence them to commit unspeakable crimes.

Plot Summary | Add Synopsis

Plot Keywords:

internet | girl | stabbing | meme | child | See All (20) »


On May 31st, 2014, in the woods outside of Waukesha, Wisconsin, two 12-year-old girls stabbed their classmate 19 times. This is the true story of what drove them to do it.



Parents Guide:

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Release Date:

26 August 2018 (Sweden) See more »

Also Known As:

Cuidado com o Slenderman See more »

Company Credits

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Technical Specs



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Did You Know?


Although the stabbing took place in Waukesha County (Waukesha). Anisa is being held further north in adjoining Washington County (West Bend). See more »


During Trevor J. Blank's interview (at the 28:18 mark), footage is shown of the popular Youtube series "WATCHER" by Andrew J. Neis. "WATCHER" is not a Slenderman-related series, it features a human stranger that stands outside of a couple's apartment window and stares at them, never moving or speaking. The creators of "Beware the Slenderman" appear to have digitally edited the video to remove the face of the "WATCHER" character and make it appear as though it could possibly be a real-life Slenderman. See more »


Herself - Stabbing Suspect: Make sure she's down.
See more »


Features Watcher (2011) See more »


Rising Walls
Music by Myuu
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User Reviews

Interesting at a Half Hour, Monotonous at Two.
27 January 2017 | by aaronndubraySee all my reviews

While the documentary seeks to explore several themes around mental health, modern folklore, bullying, and modern technology's role in adolescent development and parenting it seldom finds a coherent thread to pull them together in any meaningful way. The film starts interestingly enough exploring the story of two adolescent girls who are pending trial as adults for the attempted murder of their friend. This in and of itself would make for a compelling case study on mandatory laws surrounding the subject of violent crimes committed by minors. Add to that the fact that the girls committed this act to gain the favor of a modern fictional boogeyman named Slenderman, and we now have the potential for an even more compelling discussion around mental health, the internet's influence on child development, modern parenting and any number of related topics. Unfortunately, this is where the narrative seems to stall with the filmmakers doing little more than exploring the folklore of Slenderman and how the girls' mutual status as outsiders may have led them to seek acceptance through belief in the fictional being. Though the filmmakers make several attempts to explore other themes including mental health (which arguably should be the central narrative), they seldom make it past a cursory examination of the facts as they exist, and attempt to draw little to no conclusion about how these facts should influence the outcome of the still pending trial. Perhaps this stance, or lack there-of, is out of respect for the victim in this tragic case, which is surprisingly absent through most of the discussion. The result however, is a story that would be thought provoking as a 30 minute true-crime new story, but feels a bit drawn out as the handful of facts are repeated ad nauseum, rarely digging past the surface of any single topic.

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