'The Monster of the Opera') is a 1964 Italian horror film co-written and directed by Renato Polselli and starring Marco Mariani and Giuseppe Addobbati.

After performing a Charleston and a sexy jazz-modern dance number, the crew is startled by the applause of a tuxedo-clad man in the audience, the titular vampire, who approaches the troupe and entrances its lead dancer, Julia.

After wandering alone into the depths of the theater, Julia encounters the vampire, who bites her and takes her to his crypt, where his bouffanted brides are chained to a wall and giggle and hiss at one another.

[1][2] Initially conceived as a sequel of Polselli's 1960 horror film The Vampire and the Ballerina,[2] it had the working title "Il vampiro dell'opera" (lit.

[1] In his book Italian Horror Film Directors, Louis Paul noted the similarities with Polselli's The Vampire and the Ballerina, both in "his fascination with full-bodied voluptuous actresses as well as the cheap and exploitative premise.