Lady Killer (French: Gueule d'amour) is a 1937 French drama film directed by Jean Grémillon and starring Jean Gabin, Mireille Balin and Marguerite Deval. It has been classified as both a film noir and an entry into the poetic realist group of films of the late 1930s. It was produced by the German company UFA in conjunction with its own French subsidiary ACE. Like Port of Shadows it drew on the tradition of German expressionism in its lighting and set design, although the Nazi authorities were opposed to the expressionist style.

It was shot at the Babelsberg Studios in Berlin and on location around Cannes, Orange and Paris. The film's sets were designed by the art directors Hermann Asmus and Max Mellin. The film was selected for screening as part of the Cannes Classics section at the 2016 Cannes Film Festival.