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.
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