A tall, blonde actress adept at both comedy and drama, easily adaptable to playing "real folks" such as frowsy women and po' white trash, Celia Weston is best recalled by TV audiences for the four seasons (1981-85) she served slop at Mel's Diner in the CBS sitcom "Alice." But, since the 1990s, she has proven a formidable character player on stage and in films.