‘Onslaught’ Release Date, Trailer, Cast, and Plot Details for Adam Wingard’s A24 Thriller

‘Onslaught’ is set to arrive as one of the more physically intense entries in A24’s 2026 lineup, and audience interest has been building steadily since the first footage surfaced earlier this summer. The film is a horror infused action feature from director Adam Wingard, known for ‘You’re Next’ and ‘Godzilla vs. Kong,’ and it is slated for theatrical release on Friday, September 4. With a genre blend of survival horror and military science fiction, the project has generated steady coverage across entertainment outlets in the weeks leading up to its debut.

For anyone tracking the movie’s rollout, the key details around its release window, trailer content, ensemble cast, and central plot have gradually come into focus. Led by Adria Arjona, the film blends survival horror, military science fiction, and relentless action as one woman fights to protect her family from genetically engineered super soldiers. Below is a breakdown of everything currently known about ‘Onslaught’ ahead of its wide theatrical opening.

‘Onslaught’ Release Date and Time

The official release date for ‘Onslaught’ is Friday, September 4, 2026, with the film opening in theaters nationwide. There is no confirmed exact showtime since scheduling varies by theater chain and region, but ticketing platforms have already opened presales ahead of the premiere.

Eleven other films are opening on the same date, including ‘By Any Means,’ ‘Cars 20th Anniversary,’ and ‘Tom and Jerry Forbidden Compass,’ making the first weekend of September a crowded one at the box office. ‘Onslaught’ will also open opposite Paramount’s crime thriller ‘By Any Means,’ starring Mark Wahlberg and Yahya Abdul-Mateen II, along with the Sundance horror film ‘Buddy’ and the documentary ‘Barbara Forever’.

Ticket sales have already begun through major chains. Fandango has been running a promotional offer tied to advance ticket purchases for ‘Onslaught,’ available for a limited window surrounding the release. AMC Theatres has also listed showtimes for the film at locations nationwide.

‘Onslaught’ Trailer Breakdown

A24 released the first trailer for ‘Onslaught’ this summer, describing it as an action packed super soldier thriller set in the desert. The footage introduces Adria Arjona as an army sniper mother living in a desert trailer park who must fight to protect her family from a rogue squad of genetically engineered super soldiers that has escaped a nearby military facility.

The early moments of the trailer establish a deceptively calm setting before the threat emerges. Arjona’s character is shown settling into the desert community with her daughter and expressing relief at having found a place that finally feels safe, while Black Hawk helicopters are later seen flying over the area in an ominous signal of what is to come.

A second trailer followed in late July, expanding on the scale of the action. Trailer 2 built on the first preview with larger action sequences, heavier gunfights, and practical stunts, along with a closer look at the super soldiers pursuing the survivors, while also teasing the imposing antagonist known as The Butcher, played by mixed martial arts champion Alex Pereira.

‘Onslaught’ Cast

The film’s ensemble cast features Adria Arjona, Dan Stevens, Alex Pereira, Michael Biehn, Drew Starkey, Rebecca Hall, Eric Wareheim, and Reginald VelJohnson. Character names have since surfaced through promotional materials tied to the release.

Adria Arjona plays Celeste, Dan Stevens plays Hans Kammler, and Rebecca Hall plays Hanna Kammler, described in marketing as one killer couple. Drew Starkey plays Cyrus, Alex Pereira plays The Butcher, and Michael Biehn plays Baylor, with Eric Wareheim playing Kovacks.

Several cast members bring notable genre credentials to the project. Adria Arjona has previously appeared in ‘6 Underground’ and ‘Hit Man,’ while Michael Biehn is known for ‘The Abyss’ and ‘Havoc,’ and Drew Starkey recently appeared in ‘Queer’. The mix of established performers and the real world fighting background of Alex Pereira gives the ensemble a distinct physical presence on screen.

‘Onslaught’ Plot

The plot centers on a mother forced back into combat mode after years of trying to leave that life behind. According to the official synopsis, the story follows Celeste, a mother and former military sniper whose peaceful life is shattered when an army of genetically engineered super soldiers escapes from a classified military facility.

The stakes are personal rather than abstract, since Celeste’s own daughter is caught in the fallout. With her daughter caught in the middle of the outbreak, Celeste must rely on her combat training and survival instincts to protect her family while uncovering the truth behind the failed experiment.

The setting plays a significant role in shaping the tone of the story. The narrative unfolds around a mother living in a trailer park who struggles to protect her family from a threat that has escaped a secret military facility, while mercenaries attempt to contain the fallout. That combination of an isolated desert community and an uncontained military experiment gives the film its central tension.

Wingard’s creative partnership on the project extends beyond directing duties. The film was written by Wingard alongside longtime collaborator Simon Barrett, based on a story the two developed together, with Aaron Ryder, Andrew Swett, Jeremy Platt, and Alexander Black also producing.

Where to Watch ‘Onslaught’

For now, ‘Onslaught’ is strictly a theatrical release with no streaming option attached. As of late August, the film has not been confirmed for any streaming platform, and audiences can currently only see it by purchasing tickets for a theatrical showing.

Major exhibitor chains have already begun selling tickets ahead of the premiere. Tickets are available through chains including Cinemark and Cinepolis in the United States. A24 has also set up its own ticketing page for the film through its app, which offers additional exclusive content tied to the release.

Given A24’s typical distribution pattern, a streaming or digital release is expected to follow the theatrical run, though no date has been announced. Anyone hoping to watch ‘Onslaught’ before that window opens will need to catch it in a theater starting September 4.

The combination of Adam Wingard’s genre instincts, a stacked cast anchored by Adria Arjona, and a premise that mixes military horror with family survival drama has already made ‘Onslaught’ one of the more talked about A24 releases of the fall, and it will be worth watching how audiences respond to Celeste’s fight once the film opens this week.