Which actress played the part of Will Smith's mother in the American sitcom "The Fresh Prince of Bel-Air"?

Vernee Christell Watson-Johnson (née Watson; born September 28, 1949) is an American actress, author, and acting coach. Watson-Johnson is best known for her recurring roles as Vernajean Williams on "Welcome Back, Kotter" (1975–1979) and as Viola "Vy" Smith on "The Fresh Prince of Bel-Air" (1990–1996), playing the mother of Will Smith's character. She also voiced Dee Dee on Hanna-Barbera's animated series "Captain Caveman and the Teen Angels". She also appeared in an "NCIS" episode (Season 14, Episode 2: "Being Bad"). She is currently playing Gloria Tyler (the head nurse) on "Bob Hearts Abishola".

"The Fresh Prince of Bel-Air" is an American sitcom television series created by Andy and Susan Borowitz that is based on the life of Will Smith. It originally aired on NBC from September 10, 1990, to May 20, 1996. The series stars Will Smith as Will Smith, a street-smart teenager born and raised in West Philadelphia who is sent to move in with his wealthy uncle and aunt in their Bel-Air mansion after getting bullied at the local playground in his neighborhood. However, his lifestyle often clashes with that of his upper-class relatives.