Maggie Smith hasn't appeared in any films.
A Private Function is a 1984 British comedy film starring Michael Palin and Maggie Smith . Death on the Nile is a 1978 British mystery film based on Agatha Christie 's 1937 novel of the same name , directed by John Guillermin and adapted by Anthony Shaffer . Gosford Park is a 2001 British mystery film directed by Robert Altman and written by Julian Fellowes . Maggie Smith . Smith played Professor Minerva McGonagall in the Harry Potter film series ( 2001 -- 11 ) .