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
Plants Mirabilis jalapa or four o'clock flower, an ornamental plant Epiphyllum oxypetalum or queen of the night, a species of cactus Oenothera macrocarpa or bigfruit evening primrose, a flowering plant
See also Les Belles-de-nuit ou les Anges de la famille, an adventure novel by Paul Féval