The trailer of the tale of a ex-music producer, an up and coming singer down on her luck and the music industry including cameos by Mos Def a.k.a Yasin Bey, CeeLo Green and more has emerged. Check out the trailer of ‘Begin Again’, as Mark Ruffalo plays an ex-music producer trying to find himself, and while doing so, he happens to stumble upon the star he’s bean searching for, below!