- Édouard Mathé as Philipe Guérande, a crack newspaper writer, investigating the Vampires.
- Musidora as Irma Vep, the Vampires' strategist who carries out many of the ring's plans.
- Marcel Lévesque as Oscar-Cloud Mazamette, Guérande's friend and coworker, who is working undercover for the Vampires.
- Jean Aymé as the First Grand Vampire, a master of disguise.
- Louis Leubas as Father Silence, a deaf mute working for the Vampires / Satanas, the Second Grand Vampire.
- Frederik Moriss as Venomous, the Third Grand Vampire, a chemist genius.
- Fernand Herrmann as Juan-José Moréno, head of a ring of crooks rival to the Vampires. Moréno possesses a hypnotic gaze that he uses to control people.
- Delphine Renot as Mme. Guérande, Philipe's mother.
- Louise Lagrange as Jane Bremontier, Philipe's fiancée and later wife.
- Jeanne Marie-Laurent as Mme. Brémontier, Jane's mother.
- Germaine Rouer as Augustine, widow of a Vampire victim and eventual fiancée of Mazamette.
- René Poyen as Eustache, Mazamette's son.
- Stacia Napierkowska as Marfa Koutiloff, a dancer and early love interest for Philipe
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- Rita Herlor as Mrs. Simpson, an American multimillionaire.
- Émile Keppens as George Baldwin, an American millionaire.
- Renée Carl as the Andalusian.
- Suzanne Delvé as Lily Flower (sometimes Fleur-de-Lys), an accomplice of Moréno.
- Miss Édith as Countess de Kerlor, a Vampire.
- Georgette Faraboni as the Vampire Dancer.
- Suzanne Le Bret as Hortense, Irma's servant.
- Maurice Luguet as De Villemant.
- Mademoiselle Maxa as Laure.
- Gaston Michel as Benjamin, Mazamette's servant.
- Laurent Morléas as Grand Army Officer.
- Thelès as the Magistrate.
- Jacques Feyder as a party guest.
- Françoise Rosay as a party guest.
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