Anne-Marie Johnson (born July 18, 1960) is an American actress and impressionist who has starred in film and on television. Anne-Marie Johnson is perhaps best known for her roles as Nadine Hudson Thomas on What's Happening Now!!, Aileen Lewis on "Double Trouble", Althea Tibbs on In the Heat of the Night, and as a cast member on In Living Color during its final season. Anne-Marie is the former First Vice-President of the Screen Actor's Guild. She ran for president of the actors' union in 2009 on the Membership First ticket, but lost to eventual winner Ken Howard.