Michael Kenneth Williams is best known for his portrayal of Omar Little on the HBO drama series The Wire and Albert "Chalky" White on the HBO series Boardwalk Empire.
Williams had a recurring role on J. J. Abrams' Alias. He also had a recurring role on Abrams' produced Six Degrees. He has also made brief appearances on CSI: Crime Scene Investigation (playing two different characters on two different seasons), Boston Legal, The Sopranos, Law & Order (playing three different characters on three different seasons), Law & Order: Special Victims Unit (also playing two different characters on two different seasons), Human Giant and Third Watch.
One of his most recent appearances was in the HBO movie Bessie.