Laurence Tureaud, better known as Mr. T is an American actor best known for playing the character B.A.Baracus in the 1980's TV show The A-Team and Clubber Lang in the 1982 movie Rocky III.
He has made several appearances, mostly voiced by Hank Azaria. He made one appearance as part of Krusty's barmitzma, when he voiced himself[1]. He is a member of the Stonecutters World Council[2]. He appeared on stage as part of a show in Branson, Missouri[3].
Non-canon
Nelson turned Milhouse into Mr. T when he cast a spell on him[4].
Appearances
Episode – "Homer the Great" 
THOH – "Treehouse of Horror XII" - Episode – "The Old Man and the Key"
Episode – "Today, I Am a Clown" - Episode – "Homerazzi"
- Episode – "Midnight Towboy"