Game of Thrones' Maisie Williams and The Witch's Anya Taylor-Joy have just made the jump from just "abnormally doe-eyed" to actual "mutants." According to Hitfix, the two are joining the cast of New Mutants, 20th Century Fox's spin-off to their X-Men franchise. It's said Williams will play the lycanthropic Wolfsbane, while Taylor-Joy will play Magik, Colossus's sister, a mutant capable of teleportation, sorcery, and wielding a mystical blade. James McAvoy and Alexandra Shipp are already attached to reprise their respective X-roles as Xavier and Storm. Director Josh Boone (The Fault in Our Stars) reportedly has still to cast the roles of Cannonball, Sunspot, and Mirage, the trio of New Mutants famous for sounding most like failed car models.