Take note now: Oculus, though it may look formulaic at first glance, is not your average horror movie. Though it has yet to officially premiere in the US, it already holds pretty amazing reviews on Rotten Tomatoes, and its first teaser—which was just released—actually might do a good job of scaring the shit out of everyone. 

It doesn't give us much of an idea of the plot or anything, but it does feature a look at a creepy mirror, and star Karen Gillan looking completely terrified out of her mind. Luckily, though, Comingsoon.net has the full synopsis:

Ten years ago, tragedy struck the Russell family, leaving the lives of teenage siblings Tim and Kaylie forever changed when Tim was convicted of the brutal murder of their parents. Now in his 20s, Tim is newly released from protective custody and only wants to move on with his life; but Kaylie, still haunted by that fateful night, is convinced her parents’ deaths were caused by something else altogether: a malevolent supernatural force­­ unleashed through the Lasser Glass, an antique mirror in their childhood home. Determined to prove Tim's innocence, Kaylie tracks down the mirror, only to learn similar deaths have befallen previous owners over the past century. With the mysterious entity now back in their hands, Tim and Kaylie soon find their hold on reality shattered by terrifying hallucinations, and realize, too late, that their childhood nightmare is beginning again…

Check out the teaser above, and the first poster for the film featuring Gillan (kind of), below. Oculus will hit theaters on April 11.

[via EW]

[Image via Relativity Media]

RELATED: TIFF Review: The Smart, Inventive "Oculus" Is the Best Horror Film of the Festival