Back in September of 2013, John Carney's "Can A Song Save Your Life?" premiered at the Toronto International Film Festival to some rave reviews. Six months later, the film's first trailer has arrived following a recent title change. Now called "Begin Again," the "Once" director's film stars Mark Ruffalo as a down-on-his-luck music executive, Keira Knightley as a down-on-her-luck singer and Adam Levine, CeeLo Green and Mos Def as various music industry people. The biggest takeaway here is Ruffalo, who maybe has never been given so much outright comedy before (not unless you count all the cuckoo nonsense that happens in "Now You See Me"). He's funny! He's charming! He's ruffled! "Begin Again" closes the 2014 Tribeca Film Festival before arriving in theaters in July, where it will be positioned by The Weinstein Company as the indie summer romance of choice. Watch the trailer below.