Beware Boiúna is a survival monster-horror film set in the Amazon rainforest, with a special screening at Fantastic Fest on Opening Night, September 17, 2026, ahead of its scheduled theatrical release in the U.S. on October 2, 2026.
Directed by Mike P. Nelson, with a screenplay by Alan McElroy and a story by Tony Giglio and Alan McElroy, the trailer has already been released and is in theaters here in Austin in time for Fantastic Fest at the Alamo Drafthouse South Lamar. From the trailer alone, this action, horror, and thriller looks like the perfect film to open the festival for returning fans and newcomers alike.
Synopsis: Deep in the Amazon, a medical mission spirals into a fight for survival when Boiúna, a colossal ancient predator, awakens to reclaim her domain. In the jungle where nature holds absolute power, she decides who lives and who dies.
Cast: Logan Marshall-Green as Brennan Malloy, Jessica Rothe, Kiana Madeira, Jackson Bews as Shawn, Juan Pablo Shuk as Miguel, Vicente Peña as Pedro, Diego Nelson Camayo as Guilherme, Jaime Newball as Raúl, Christophe de Geest as Proctor.
Rating: R (bloody violent content, some grisly images, and language). Runtime: 104 minutes
This film will be available to view on one night only at the festival in Austin, and for more information about the festival and tickets, visit the Fantastic Fest website. If you are not in Austin for the festival night, check your local theater listings for this Lionsgate film in the U.S. on October 2, 2026.
Source: Lionsgate/ Fantastic Fest