The Wicked Lady is a 1945 British costume drama film directed by Leslie Arliss and starring Margaret Lockwood in the title role as 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).

It was one of the Gainsborough melodramas, a sequence of very popular films made during the 1940s.

The story was based on the 1945 novel Life and Death of the Wicked Lady Skelton by Magdalen King-Hall which, in turn, was based upon the (disputed) events surrounding the life of Lady Katherine Ferrers, the wife of the major landowner in Markyate on the main London–Birmingham road.

A remake, also named The Wicked Lady, was made by Michael Winner in 1983.