New releases

★ ★ ½ Beautiful Creatures A teenage boy (Alden Ehernreich) discovers his new girlfriend (Alice Englert) is a witch. Adapted from the first of four “Caster Chronicles” novels, but it may play better if you’re not a convert. As “Twilight” knock-offs go, this has its pleasures, mischievous banter and two happy hams named Jeremy Irons and Emma Thompson among them. (124 min., PG-13) (Ty Burr)