Keith David Williams (born June 4, 1956) is an American actor, voice actor and producer. He is the voice of the "World's Greatest Teacher" Mug on Close Enough.

He is known for portraying Childs in The Thing, King in Platoon, and Tublat in The Legend of Tarzan. He is also known for voicing Goliath on Gargoyles and Dr. Facilier in The Princess and the Frog.