LOS ANGELES (AP) — Cara Delevingne wants you to know she didn't strut directly from the fashion runway onto Hollywood movie sets. The British model wasn't hand-picked by studio executives for her lead role in "Paper Towns," which opened this weekend. In "Paper Towns," adapted from John Green's popular young adult novel, Delevingne plays the enigmatic Margo, who wrangles Wolff's character into an all-night adventure, then disappears. [...] Delevingne says that while the promotional grind of releasing a movie isn't so different from modeling — plenty of posing for photographers — she's intrigued by the media megaphone provided by movie stardom.