Mark Ruffalo (Marvel Avengers Assemble), Keira Knightley (Atonement) and James Corden (Gavin and Stacey) discuss their new film. Funny, inspirational and uplifting, Begin Again follows Greta (Knightley) and her long-time boyfriend who move to New York to pursue their passion for music. Initially heartbroken when he rejects her for fame and fortune, her life begins to look up when a down-on-his-luck record producer Dan (Ruffalo) stumbles upon her singing during an open mic night. Hosted by Ed ...