Le loup-garou (The Werewolf) is a 19th Century opéra comique in one act in French with music by Louise Bertin and a libretto by Eugène Scribe and Jacques Féréol Mazas.

In a village in Burgundy in the Fifteenth Century, Alice's guardian Raimbaud has arranged for her to marry the falconer Bertrand.

Raimbaud works for the Comte Albéric, who has been exiled by the king until he finds a woman who loves him for himself and not his title and wealth.

When thirteen arrive for dinner, Bertrand is spooked by the number; Catherine goes to find another to join them and returns with Hubert.

[11] The original cast was Jean-Baptiste Chollet as the Comte Albéric, M. Valère as Raimbaud, Augustin Vizentini as Bertrand, Geneviève-Aimé-Zoë Prévost as Alice, and Marie-Julie Boulanger as Catherine.

[12][20] The leading Parisian newspaper Journal des débats (which was owned by the composer's father, Louis-François Bertin) wrote that the audience at the first two performances "laughed a lot" and found the music to be graceful, fresh, and original, executed by "the perfect ensemble" of singers.

[21] Le Figaro called the plot "implausible and ridiculous" and said the music was "weak and lacks color.

"[22] The Revue musicale said the audience at the first performance was so rowdy that the opera could not be judged properly; but at the second, the work was a "complete success" which received "lively applause.

The vocal lines are unadorned compared to the contemporary music of Rossini or even composers like Hérold and Auber.

[30] The cast was Michael Rodriguez as the Comte Albéric, Miguel Pedroza as Raimbaud, Thomas Drew as Bertrand, Yejin Lee as Alice, and Mélanie Ashkar as Catherine.

[27] The first British production of Le loup-garou was given in London by Gothic Opera in October and November 2022 at the Round Chapel in Lower Clapton, Hackney.

[36] The "modernized libretto" of this version was by J. Deschene and Teri Kowiak with new music by Molly Preston.

"[38] One review said the "apparent attempt at an edgy, risky operatic equivalent of The Rocky Horror Picture Show misjudged badly.