Here's a Look at HBO's BEWARE THE SLENDERMAN Documentary Poster

Slenderman is probably one of the most prolific urban legends of this generation. Beginning as something of an internet meme it turned into a horror sensation that enraptured people. HBO has created a documentary that engages with the story of Slenderman called Beware of the Slenderman, but more specifically the real life crime that took place in his name.  

The legend began innocently enough in 2009 on an internet forum that challenged people to manipulate real life images to seem supernatural. Forum user "Victor Surge" took the cake with horrifying images of children and what became known as Slenderman standing behind them. From there, the internet had its way with this new terrifying character and stories were written about him usually stalking or abducting children. 

Since 2009, Slenderman was nothing more than a well-done and well-known horror character online. However, in 2014, two twelve-year-old girls in a small town in Wisconsin, took to the forest and stabbed a classmate 19 times. As if that scene wasn't horrific enough, the young girls blamed their deeds on none other than Slenderman himself. 

The HBO documentary will be premiering today, Friday, March 11, at SXSW, although there is no set date for when the movie will actually be featured on HBO. In the meantime, you can take a look at this pretty terrifying poster and brush up on your Slenderman lore.