Taylor-Joy will play Magik, a young sorceress who is also the sister of the X-Men bruiser Colossus, while Williams will portray Wolfsbane, a lycanthrope struggling to reconcile her powers with her religious beliefs, reported Entertainment Weekly.
Josh Boone is directing the film from a script he wrote with Knate Gwaltney. Based on the Marvel comic, the film will focus on a diverse group of teenage mutants who are still coming of age.
The movie is expected to begin production in July this year.
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