Nightbitch is a 2024 American black comedy horror film written and directed by Marielle Heller, based on the 2021 novel by Rachel Yoder.

Nightbitch premiered at the Toronto International Film Festival on September 7, 2024,[3] and was released theatrically in the United States by Searchlight Pictures on December 6, 2024.

She begins to experience surreal physical changes, including patches of fur on her body, the growth of a tail and additional nipples, and heightened senses.

She begins to dream about her childhood in a Mennonite society, including memories of her mother running on all fours and concocting stews with unusual ingredients.

Embracing her new identity, she adopts increasingly canine behaviors, finding liberation from societal expectations and a renewal of her artistic passions.

In July 2020, Annapurna Pictures acquired the film rights to the then-unpublished Nightbitch, written by Rachel Yoder, with Amy Adams attached to star and produce.

[5] Stacy O'Neil of Adams' Bond Group Entertainment production company co-produced the film alongside Megan Ellison, Sue Naegle and Sammy Scher, while Yoder served as executive producer.

The website's consensus reads: "As far as adaptations go, Nightbitch packs more bark than bite as the stellar Amy Adams takes on motherhood and the neighborhood in a rather conventional romp.