Viola Davis is an American actress and producer. She has won an Academy Award, a Tony Award, and two Emmy Awards. Davis began her acting career in the early 1990s, and has since appeared in several films and television shows. Her role in the film The Help earned her an Academy Award for Best Supporting Actress.
As for whether Viola Davis wears a wig, it appears that she does not. In an interview with Oprah Winfrey, she said that she doesn't have the patience to wear a wig. She also said that she likes to keep her hair short because it's easier to take care of.