Smith also starred in the London stage premiere of Bennett's The Lady in the Van. She will be joined on screen by Alex Jennings (A Midsummer Night's Dream, "The Queen"), who will play the role of Bennett.
Tony winner Smith's Broadway credits include New Faces of 1956, Private Lives, Night and Day and Lettice and Lovage. The two-time Oscar winner's film work includes "California Suite, "The Prime of Miss Jean Brodie" and "A Room with a View." She currently stars in "Downton Abbey." Her work at the Royal National Theatre includes Othello, Hedda Gabler, The Master Builder and Much Ado About Nothing. Smith has been nominated for six Olivier Awards.