Slenderman is an urban legend that was born from internet creepypasta. He invaded the real world a few years ago when two 12-year-old girls stabbed their friend and said that Slenderman made them do it. Now the legend is coming to theaters. We don't get a good look at Slenderman from the trailer for Slender Man (just his victims) but it appears to be pretty scary. You've been warned.
Slenderman has already been the subject of one movie, HBO’s Beware the Slenderman, and a couple of TV shows. The feature film will be in theaters this coming May.