Sean Penn wasted no time finding a new galpal in the wake of his split from Robin Wright Penn—and she’s just half his age and a swimsuit model to boot. The actor, 49, has been spotted around New York City with Jessica White, 25, and “they are pretty serious,” a source tells People. Another source spotted the pair, who met last month at a birthday party at Kid Rock's house, “lounging around. He seemed really into her.” (More Sean Penn stories.)