Best will play the boxing legend.
Hardwick will play his father, Cassius Cash Clay Sr. Gourrier will play his mother, Odessa Bird Clay.
Co-executive producing is David Blackman for Polygram.
Omari Hardwick and Dana Gourrier (inset) Cassius and Odessa Clay parents of boxer Muhammad AliCourtesy/Tamica Lee/AP Photo
He is repped by UTA.
Gourriers recent credits include a recurring role on the AMC seriesInterview With The Vampire.
She is repped by Paradigm and Principal Entertainment LA.
