Mark Christopher Lawrence is an American character actor, stand-up comedian, and voice-over artist. He is known for his role as esoteric D.J., Tone Def, in the satirical rap mockumentary Fear of a Black Hat. Other film credits include Terminator 2: Judgment Day, Tales From the Hood, Planet of the Apes, Lost Treasure, and The Pursuit of Happyness.

Mark is best known for his role as Big Mike on NBC's Chuck. Guest appearances include FOX's Glee, NBC's Heroes, NBC's Crossing Jordan, ABC's Dharma & Greg, FOX's Malcolm in the Middle, NBC's Seinfeld, and Disney Channel's Good Luck Charlie.

Theatre credits include Lincoln in Topdog/Underdog, Walter Lee Younger in A Raisin in the Sun, Ladell in Gibson Girl (Moxie Theatre); Boy Willie in The Piano Lesson and Gabriel in Fences (Cygnet Theatre); Jonathan in Gangsters (Blue Trunk Theatre); Reggie Hudson in Since Africa (Diversionary Theatre); and Matthew in Cotton Patch Gospel (Lamb’s Players Theatre).