Leonardo DiCaprio’s latest model target is Britain’s Cara Delevingne — but for once he doesn’t seem to be having much luck. The actor, 38, begged the beauty, 20, for her phone number at Cannes, reports Life & Style. “Leo kept hitting on her at the ‘Great Gatsby’ bash at Cannes,” a source tells the magazine. “He even lunged at her at one point, and she dodged him.” But DiCaprio, who’s dated top models including Gisele Bündchen and Bar Refaeli, wouldn’t give up: “He was begging her to go back to his hotel room, but she declined.” Eventually, the source said, Delevingne gave him her number, but we’re not so sure she’s into him.