Mark Ruffalo pulls a "Jerry Maguire" in the trailer for "Begin Again," a sweet-looking film about lost people who find each other through music. Ruffalo stars as Dan, a record label executive who gets the boot. He meets Keira Knightley's character, Gretta, who just got out of a relationship with longtime love turned rock star Dave (Adam Levine). Gretta's also a songwriter and Dan is totally taken with her music after he sees her perform in a small East Village bar. Cee Lo Green is also there doing his Cee Lo Green thing. From "Once" writer-director John Carney, "Begin Again" also has backing from Judd Apatow and the Weinstein Company. It's out in theaters July 2.