Gillian Anderson stars in the upcoming horror film 'Teenage Sex and Death at Camp Miasma,' directed by Jane Schoenbrun. The film, which premiered at the 2026 Cannes Film Festival, has garnered critical acclaim, maintaining a perfect 100% score on Rotten Tomatoes and winning the Queer Palm prize for LGBTQIA+-relevant cinema. In the film, Anderson plays Billy Preston, a character hired to revive the Camp Miasma slasher franchise. The newly released trailer showcases a mix of slasher horror and surreal psychosexual themes, as Billy and Kris (played by Hannah Einbinder) confront a killer known as Little Death, who bears a resemblance to the iconic Pyramid Head from Silent Hill. The film is part of Schoenbrun's Screen Trilogy, which explores queer identity and media influence, with 'Teenage Sex and Death at Camp Miasma' being the most star-studded entry yet. The film is set to hit theaters on August 7.