Mos Def and Erykah Badu have signed on to star in the indie drama ‘Bobby Zero’; a film focused upon the life of fictional struggling artist Bobby Zero as he hits rock bottom before going corporate with a job in advertising. Badu will play his girlfriend who is afflicted with agoraphobia.Bobby Zero is slated to begin filming in 2009 after the birth of Badu and Jay Elec’s bundle of joy.  Keep an eye out for it coming to the big screen soon.