A new trailer for John Carney's upcoming film Begin Again has premiered online, see Keira Knightley and Adam Levine in action.

Begin Again tells the story of a dejected music producer (Ruffalo) who bonds with a singer-songwriter (Knightley) who has just broken up with her boyfriend (Levine).

Written and directed by Once creator John Carney, Begin Again is set for release on July 11.