It stars Lauren Beatty as Grey, an indie singer-songwriter who begins to transform into a werewolf while working at a remote wilderness recording studio with producer Vaughn (Greg Bryk).

A reclusive music producer, Vaughn Daniels, once a famous boy-band singer in the '90s, invites Grey to his remote mansion to write and record her second album.

He was not certain before this, because her mother, Greta, whom he had shot and killed in self-defense, had told Vaughn, who was gone for months at a time with his band, that their baby had died.

Vaughn sends his housekeeper, Vera, to bring Grey back and locks her in the recording studio to complete her transformation.

As Montreal-based[2] director Amelia Moses recalled, "I was finishing up my first feature [Bleed with Me], and I was looking for some friendly advice from a producer about distribution in Canada."

Moses met with screenwriter Wendy Hill-Tout, who wrote the script with daughter Lowell Boland, "and then it all just happened really quickly.

But I had to learn piano in those five days ... just the chords that you actually see Grey playing...."[6] Greg Bryk said he had been shooting a movie Hill-Tout was directing and Peterson producing, "and they approached me and asked if I was interested in being a part of it.

When you're working on a low-budget film, you don't have a lot of budget for set decoration, so this house had so much stuff — the man who owns it is a collector.

[7] In February 2021, Brainstorm Media acquired the U.S. rights to the film and planned to release it in theaters and on video-on-demand on April 23, 2021.

[citation needed] The film received two Canadian Screen Award nominations at the 9th Canadian Screen Awards in 2021, for Best Original Score (Michelle Osis and Lowell Boland) and Best Original Song (Boland, Evan Bogart and Justin Gray for "Grey Singing in Auditorium").

The site's critics consensus says, "Offering a hauntingly lush style and plenty of gore, Bloodthirsty successfully captures the nightmarish darkness behind being hungry like the wolf in the quest for fame.

"[12] According to Metacritic, which assigned a weighted average score of 63 out of 100 based on 5 critics, the film received "generally favorable reviews".

"[14] The horror specialty website Bloody Disgusting said the movie "takes a psychological approach, resulting in a slow-burn tale that favors mood over showier lycanthrope elements" and "employs a surreal, dreamy quality."

"[17] On the negative side, the large city newspaper the Detroit News called it "a horror hodgepodge that shows its fangs but doesn't bite deep enough to leave a mark," and that while director Moses "creates a tense, moody atmosphere," Beatty's lead character "never operates or fills the room like a pop star of any magnitude, and Vaughn doesn't have the swagger of even an aging boy-band member.

"[18] The general-interest RogerEbert.com said the movie "isn't as relentless or as disturbing as its name advertises" and that it "barely gets inside its antiheroine's head.

"[19] The LGBTQ newspaper the Philadelphia Gay News conceded that Moses "does create a sense of dread with bloody images, but too much of 'Bloodthirsty' feels slight.