Film · 2026

Beware Boiúna

Beware Boiúna is a 2026 monster horror film directed by Mike P. Nelson from a screenplay by Alan B. McElroy, based on a story by Tony Giglio and McElroy. The film stars Kiana Madeira, Jessica Rothe, and Logan Marshall-Green. It follows a medical mission deep in the Amazon rainforest that encounters a colossal mythical serpent. Beware Boiúna had its premiere at the Fantastic Fest on September 17, 2026, and was theatrically released in the United States by Lionsgate Films on October 2, 2026. The film received generally mixed reviews from critics.