In his other life, Schwartzman is the leader of the band Rooney, which parlayed a moment of fame on TV’s “The O.C.” into a few dates as an opening act on the Jonas Brothers’ 2008 When You Look Me in the Eyes Tour. While this overlap of bedroom-wall pinups may seem remarkable, it has happened before. The star of Schwartzman’s “The Good Half” is another millennial dreamboat, Nick Jonas, of the Jonas Brothers, in his first lead role. The 38th edition of FLIFF opened Friday with a red-carpet screening of “The Good Half,” a comedic drama directed by Robert Schwartzman, son of Talia Shire and nephew of Francis Ford Coppola, whose heartthrob status as an actor was enshrined in the 2001 coming-of-age flick “The Princess Diaries.” Schwartzman played Michael Moscovitz, the love interest of Anne Hathaway, in her first feature film. The Fort Lauderdale International Film Festival has arrived, and you’ll forgive millennials if they seem a little too excited.