Monseigneur is a 1949 French drama film directed by Roger Richebé and starring Fernand Ledoux, Bernard Blier and Nadia Gray.

The film's sets were designed by the art director Jacques Krauss.

Piétrefond, a historian, claims to have discovered in the archives that a humble locksmith Louis Mennechain is really descendant of the guillotined monarch of France Louis XVI.

Louis is taken up by an attractive duchess and her friends, and begins to become dazzled before his new status.

Piétrefond reveals to him that the whole thing is really a scam to make money, and Louis returns to his fiancée Anna and his previous existence.