Alex Pereira Plays The Butcher in Onslaught Movie Trailer

A24 has released the first onslaught movie trailer, and Alex Pereira is in it as The Butcher. The UFC star’s screen role gives the film a crossover hook before its Sept. 4 release.

Adria Arjona and Rebecca Hall

Adria Arjona and Rebecca Hall star in the film, which arrives as an action, horror, and thriller title. That mix puts the trailer in a crowded lane, but Pereira’s casting gives the campaign a specific hook beyond the usual genre setup.

The plot centers on a mother living in a trailer park who uses her skills to protect her loved ones from a threat that escaped a secret military base while mercenaries try to contain it. That setup leaves the film selling more than a cameo; it has to persuade viewers that Pereira fits into a story built around pressure, pursuit, and survival.

Adam Wingard and A24

Adam Wingard is tied to the movie in the trailer headline, which places the release inside A24’s slate rather than a one-off stunt. For an audience tracking genre films, that matters because A24 has made trailer drops part of the draw, not just the marketing.

Alex Pereira is one of the UFC’s biggest stars, and The Butcher gives him a named role instead of a blink-and-you-miss-it appearance. The practical read is simple: if the trailer lands with both fight fans and genre viewers, A24 gets a built-in conversation point before the film reaches theaters on Sept. 4.