The Wicked Lady is a 1945 British costume drama film directed by Leslie Arliss and starring James Mason and Margaret Lockwood. Lockwood plays a nobleman's wife who becomes a highwaywoman for the excitement. It had one of the largest audiences for a film of its period, with an estimated British attendance of 18.4 million seeing it in cinemas, according to a 2004 ranking of the most popular sound films in Britain. In the list, compiled by the British Film Institute for Channel 4, it was placed ninth overall, and was the second-most successful British film, behind only Spring in Park Lane (1948).