The Smiling Lieutenant is a 1931 American pre-Code musical comedy film directed by Ernst Lubitsch, starring Maurice Chevalier, Claudette Colbert and Miriam Hopkins, and released by Paramount Pictures.

It was written by Samson Raphaelson and Ernest Vajda from the operetta Ein Walzertraum by Oscar Straus, with libretto by Leopold Jacobson and Felix Dörmann, which in turn was based on the novel Nux, der Prinzgemahl ("Nux the Prince Consort") by Hans Müller-Einigen. The film was nominated for the Academy Award for Best Picture. This was the first of three films directed by Lubitsch and starring Miriam Hopkins. The other two were Trouble in Paradise and Design for Living.