The X-Men spin-off, due for release in 2018, stars Game of Thrones star Williams as Rahne Sinclair, aka Wolfsbane.
Alongside her are Anya Taylor-Joy, Charlie Heaton, Alice Braga and more.
The trailer was confirmed yesterday for 0:01 PST, translating to 08:01 BST in the UK.
Director Josh Boone said on Instagram: “There’s Something New To Fear #tomorrow #newmutants #teaser #xmen #thenewmutants #fridaythe13th.”
Described as a “haunted house movie with horny teenagers”, per ComicBook.com, the Marvel movie is due for release next April.
Watch the trailer above now.
Safe to say, it looks like a scary affair – the trailer boasts jump-scares, lots of screaming, and a creepy adult keeping track of the youngsters.
Could this be one of Marvel’s scariest films yet?
Anya Taylor-Joy has recently spoken about how faithful the film will be to the comics, telling Hey U Guys: “I think the nicest thing about it is that Josh Boone, our director – he’s just such a fan of the comics, and he really loves them so much that he’s really interested in just making sure that we do the comics justice for the people that love the characters.
“You know, we all feel so lucky to be such incredibly loved characters.
“So, while it’s definitely a departure from the X-Men movies, the fans won’t be disappointed. We definitely kept all the important bits in there.”
Fans have responded well to the trailer so far.
“This is an interesting approach. I like it,” one said.
“I’M SO GLAD TO BE ALIVE, THANK YOU SO MUCH,” someone else enthused.
New Mutants is out on April 13, 2018.