WATCH: Maisie Williams Stars in Terrifying Trailer for 'X-Men' Spin-Off 'The New Mutants'

It's Friday the 13th, so prepare to get spooked — and possibly develop a phobia of washing machines.

The first chilling trailer for The New Mutants was released today (October 13), and gives us our first glimpse at the next phase in the X-Men story, from The Fault in Our Stars director, Josh Boone.

It stars Game of Thrones' Maisie Williams as Wolfsbane, a Scottish mutant conflicted about her ability to turn into a wolf, and Split's Anya Taylor-Joy as Magik, a Russian sorceress who uses teleportation. Rounding out the group of young mutants are Stranger Things' Charlie Heaton as Cannonball, 13 Reasons Why's Henry Zaga as Sunspot, and The Originals' Blu Hunt as Mirage.

Basically the whole thing is to X-Men what Muppet Babies was to The Muppets, and based on a group of teenaged mutant superheroes-in-training who first appeared in Marvel comics in 1982.

Thankfully City of Gods' Alice Braga is there to look after them all as medical doctor Cecilia Reyes, and, if one mentor weren't enough, there are rumors of a substantial role for James McAvoy-as-Professor X.

The New Mutants is the latest addition to the already bulging at the seams X-Men universe. There's the main film franchise about a set of mutants led by Professor X; the delightfully irreverent Deadpool, which gets its first sequel next year; the Wolverine films, which reached a crescendo in this year's Logan; a solo Gambit movie due in 2019; TV spin-offs Legion starring Dan Stevens and The Gifted; plus a possible X-Force movie.

The trailer signals a significant difference in tone, however, with the dark hospital setting, the creepy white masks, and even what appears to be a blood-curdling shower scene, all suggesting this particular mutants' story will be more horror than superhero action movie.

Here it is:

The New Mutants opens in theaters on April 13, 2018 — another Friday 13th, fittingly.

Have you uncovered your eyes yet?