Daughters of Darkness

During filming, director Harry Kümel hit actress Danielle Ouimet during a dispute. Actor John Karlen was so infuriated by this behavior that he punched Kumel in the face. The atmosphere on the set was understandably tense afterwards.

When Ilona is lying on the bathroom floor, bikini marks are visible. Vampires are not supposed to have tan lines.

The original U.S. theatrical release was cut by approximately 12 minutes to obtain an R-rating, and features a slightly different opening credits sequence in which Lainie Cooke (not Delphine Seyrig as sometimes rumored) sings over the main theme of the film. This sequence features a stylized title logo (the same as that on the U.S. posters), while the rest of the credits use a font that is more formal and less bold compared to the original version. After being released on Canadian and American VHS (where it was retitled "Children of the Night"), the U.S. version was eventually replaced in circulation by the uncut version in the 1990s, although its title sequence is presented among the special features of Blue Underground's 2020 4K Blu-ray release of the film.

Edited into Rob Zombie: Living Dead Girl (1999)