Mia McKenna-Bruce (BIFA winner for “How to Have Sex”), Louisa Connolly-Burnham (“Vampire Academy”) and Michael Fox (“Downton Abbey”) will star in “Sister Wives.”

The film is a love story that follows two young women living in a strict, fundamentalist, polygamous society. Kaidence and Galilee find themselves bound to one another, under the same roof, in the same marriage, as they develop scary, new, exciting feelings for each other. In a harsh, regressive, watchful community where being queer is considered a cardinal sin, they begin having thoughts of leaving the only life they have ever known behind.

Connolly-Burnham wrote the script, which is a short that will be further developed into a feature, and will also direct, having directed several shorts previously. The script is a semi-finalist at the Oscar-qualifying Flickers: Rhode Island International Film Festival and also won the Sunday Shorts script competition. “Sister Wives” has also been shortlisted for the First Flights-Kodak fund and stands to win a grant of $10,000.

Co-producing with Connolly-Burnham is Augusta Woods (“Ted Lasso”) and BIFA-nominated executive producer Emily Everdee (“Mandem”). The production companies are U.K. entities Thimble Films and Track Films. Filming commences in January 2024 with a release planned for the fall.

Connolly-Burnham said: “After a tough year for our industry I’m thrilled to finally bring this special story to screen with the team that I dreamed of.”

McKenna-Bruce added: “I’m overjoyed to be joining this film, Louisa’s writing is simply beautiful and I fell in love with the characters and their story the minute I read her script.”

Fox said: “I’m incredibly excited to be a part of this project. I love Louisa’s writing. Open-hearted, subtle and compelling. I feel very lucky to be working with such a talented group of people.”