Jasmine Chanel Guy (born March 10, 1962) is an American actress, singer, dancer, and director. She portrayed Dina in the 1988 film School Daze and Whitley Gilbert-Wayne on the NBC The Cosby Show spin-off A Different World, which originally ran from 1987 to 1993. Guy won four consecutive NAACP Image Awards from 1990 through 1993 for Outstanding Lead Actress in a Comedy Series for her role on the show. She played Roxy Harvey on Dead Like Me and as Sheila "Grams" Bennett on The Vampire Diaries. She also played the role of Gemma on Grey's Anatomy.