"Cadillac Records" also featured such characters as Chess co-founder Leonard Chess (Adrien Brody) and the label's artists, including Muddy Waters (Jeffrey Wright), Little Walter (Columbus Short), Howlin' Wolf (Eamonn Walker) and Willie Dixon (Cedric the Entertainer).
Darnell Martin ("Their Eyes Were Watching God") is directing from his own script. Also joining the cast is Gabrielle Union, who will play Geneva Wade, a girlfriend of Waters.
Mos Def was recently in theaters with Michel Gondry's comedy "Be Kind Rewind." Union's credits include ABC's "Ugly Betty" and the upcoming Eddie Murphy comedy "Meet Dave."


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