Belle de nuit is a French phrase meaning "Beauty of the night".
Belle de nuit may refer to: Belle de Nuit (horse), a horse winner of the Test Stakes race in 1966 Belle de nuit (film), a 1933 French film with Véra Korène Belle de Nuit, a 2017 French biopic film about Grisélidis Réal Les Belles de nuit (US title: Beauties of the Night), a 1952 French language motion picture fantasy directed and written by René Clair