The Twentieth Duke (Italian: Il ventesimo duca) is a 1945 Italian comedy film directed by Lucio De Caro and starring Paola Veneroni, Roberto Villa and Paola Borboni.

[1] It was shot at the Cinecitta Studios in Rome.

The film is based on a 1925 play by Ugo Falena which had previous been made into films on two occasions The Last Lord (1926) and The Woman Dressed As a Man (1932).

The story tells of the only surviving relative of an old Duke, his granddaughter, who pretends to be a man in order to convince him that the line of succession is secure.

This article related to an Italian film of the 1940s is a stub.