Margaret JoBeth Williams (born December 6, 1948) is an American actress and director.

For Disney, she played Dr. Patricia Cromwell in Jungle 2 Jungle, Ursula Kent in the CBS/ABC TV show Criminal Minds, Bizzy Montgomery in the ABC TV show Private Practice, Sandra Harding in the ABC TV show Scandal, Quinn's grandmother in the ABC TV show The Good Doctor, Margaret Pierce in the ABC Studios TV show Perception and Janet in the ABC TV show Mistresses.