Stockard Channing has not worked in films.
Stockard Channing ( born Susan Antonia Williams Stockard ; February 13 , 1944 ) is an American stage , film and television actress . She is known for playing Betty Rizzo in the film Grease ( 1978 ) and First Lady Abbey Bartlet on the NBC television series The West Wing ( 1999 -- 2006 ) . She is also known for originating the role of Ouisa Kittredge in the stage and film versions of Six Degrees of Separation , for which she was nominated for a Tony Award and the Academy Award for Best Actress .