Michael Kenneth Williams (born November 22, 1966) is an American actor. He played Omar Little on the HBO drama series The Wire and Albert "Chalky" White on the HBO series Boardwalk Empire. He was also acclaimed for his role as Jack Gee, husband of Bessie Smith, in the HBO telefilm biopic Bessie. He has acted in supporting roles in a number of films and television series, including The Road, Inherent Vice, The Night Of, Gone Baby Gone, 12 Years a Slave, When We Rise and When They See Us.
Williams received three Primetime Emmy Award for Outstanding Supporting Actor in a Limited Series or Movie nominations for his roles in Bessie (2015), The Night Of (2016) and When They See Us (2019).
He is also known as Michael Kenneth Williams and Michael Williams.