Beware Boiúna Review | Fantastic Fest 2026
FANTASTIC FEST 2026 REVIEW
One of the first real surprises of Fantastic Fest 2026 comes from a movie I expected to be among the films I liked the least on opening night.
That movie is Beware Boiúna.
Going into Mike P. Nelson’s giant-snake movie, there was some skepticism about what could distinguish another oversized-creature feature in a genre that has been revisiting almost every possible monster lately. Seeing it positioned as part of Fantastic Fest’s opening-night lineup only raised the question of whether there was enough here to warrant that placement.
There was one obvious reason to have more confidence: Nelson.
His work within horror has repeatedly demonstrated an understanding of how to make genre filmmaking fun without treating the material like a joke. That becomes essential with Beware Boiúna, because this is absolutely a movie about a gigantic snake hunting people through the jungle. There is no escaping the inherent creature-feature appeal of that premise.
Nelson doesn’t try to escape it.
Instead, Beware Boiúna embraces the monster movie while building considerably more mythology around its creature than expected. The result is a film that could easily fly under the radar before eventually becoming one of 2026’s more entertaining genre releases.
Jessica Rothe leads a strong ensemble, but one of the movie’s pleasant surprises is how effectively the supporting cast establishes itself around her. Rothe doesn’t have to carry every sequence alone. The characters surrounding her are given enough personality and presence that the movie feels like an ensemble being gradually swallowed by an increasingly hostile environment.
And that environment matters. Kiana Madeira is the standout you want her to be in the film. She has just as much leading lady material as her counterpart.
Before Boiúna completely establishes herself as the central threat, the jungle already feels like an antagonist.
Nelson understands that dropping characters into this environment means there should be danger everywhere. The vegetation, water, weather and limited visibility all contribute to the feeling that these people have entered somewhere they do not control.
Once the creature begins asserting that control, the distinction becomes even more important.
They are not simply being chased by a snake.
They are trapped in her world.
That approach gives Beware Boiúna a sense of scale beyond simply waiting for the next creature attack. The jungle becomes part of the mythology surrounding Boiúna, and the movie gradually introduces folklore and mysticism that give the monster considerably more cultural texture than a standard animal-gone-wild story.
Comparisons to other giant-snake movies are inevitable. Horror fans know the obvious reference points, particularly with oversized serpents returning to mainstream genre filmmaking.
But Beware Boiúna is more interesting when viewed through a different lens.
There are moments when the relationship between Boiúna and her environment feels closer to the way Ridley Scott’s Alien and James Cameron’s Aliens use hostile spaces around their creatures. The monster is terrifying, but so is the realization that the characters have entered an ecosystem in which they are fundamentally disadvantaged.
That doesn’t mean Beware Boiúna suddenly becomes Alien in the jungle. Nelson’s film remains much lighter on its feet, with humor mixed throughout the adventure and enough monster-movie energy to keep the experience accessible.
The difference is that the humor doesn’t eliminate the threat.
Around 20 minutes into the film, it becomes apparent that Nelson and company are interested in doing considerably more with Boiúna than simply making her enormous. The mythology begins expanding, and the movie gradually reveals additional dimensions to what the creature represents and what she is capable of.
That was the point where my expectations began changing.
The film is also much more structurally controlled than anticipated. A creature feature like this can easily become a collection of attacks loosely connected by exposition, particularly when mythology, comedy and character development are competing for time.
Beware Boiúna avoids most of those problems.
The pacing remains consistent, the narrative moves cleanly between its characters and the lore surrounding the creature develops without stopping the movie every few minutes to explain itself.
Then there is Boiúna herself.
Modern monster movies have an unusual problem. Technology has theoretically made it possible to put almost anything imaginable onscreen, but that freedom doesn’t automatically make creatures convincing.
Older genre cinema could ask audiences to accept giant ants, frogs, insects, reptiles and countless other monsters because part of the experience required imagination. CGI changed that relationship. Audiences can now see almost anything, which means they have also become increasingly sensitive to effects that don’t convince them.
Beware Boiúna clears that hurdle.
The creature looks good, and more importantly, the effects are integrated into sequences where Boiúna feels like she occupies the same physical environment as the characters. The film understands that scale only works when the surrounding world helps sell it.
When contemporary effects accomplish that, they deserve credit.
So does Nelson.
There is something particularly satisfying about entering a movie expecting it to be disposable and leaving surprised by how well everything came together. The cast works. The creature works. The jungle works. The mythology adds something beyond spectacle, and the pacing keeps the movie from collapsing underneath its own monster.
There are still familiar ingredients here. Anyone who has spent years watching giant-creature movies will recognize plenty of the machinery underneath Beware Boiúna. It doesn’t completely reinvent the creature feature, nor does it need to.
What it does is remind audiences why these movies are fun when filmmakers commit to them
For someone who has always loved giant-monster movies, the biggest complaint might simply be having underestimated this one in the first place.
Beware Boiúna came into Fantastic Fest 2026 as one of my bigger question marks.
It leaves opening night as the festival’s first genuine surprise.
3.5 out of 5
Reviewed as part of Horror Movies Uncut's Fantastic Fest 2026 coverage in Austin, Texas.
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