A24 has finally put a date on one of the most secretive horror projects in recent memory. On Monday, the studio unveiled a teaser poster for Slayground, the new Jeremy Saulnier film that spent most of its life under the title October — and the poster confirmed the haunted-attraction horror will open in theaters on January 29, 2027. The first full trailer arrives Tuesday, October 20.
The poster and the release date
The new poster is a pitch-black joke in the best Saulnier tradition: a parody of the workplace-safety sign that counts the days since the last accident. Here, the word is homicide, and where the number should be sits a big blue zero with a sad face. The small print underneath delivers the real news: in theaters January 29, 2027.
The date resolves weeks of speculation. A24’s marketing has been a slow-burn Halloween tease — a mysterious September first look built around haunted-house security-camera footage, plus a countdown site at RunLikeHell.com that offered no explanation. The timing is deliciously perverse: a Halloween-set horror film launching its campaign during spooky season but arriving nowhere near Halloween.
What is Slayground about?
A24 has kept plot details tightly under wraps, but the premise that has emerged is classic Saulnier — a pressure-cooker situation with nowhere to run. Cory Michael Smith stars as a man suspected of mass murder who slips through police custody and vanishes into a haunted attraction called Slayground, with a massive manhunt closing in around him.
The first teaser, released in September, leaned entirely into found-footage-style surveillance feeds from the attraction, suggesting a Halloween night that goes catastrophically wrong for everyone wandering its maze.
Saulnier wrote, directed, and produced the film. It is his first feature since Rebel Ridge and his return to full-blooded genre filmmaking a decade after Green Room (2015) — the blistering punk-siege thriller that remains his calling card. After detouring into thrillers with Hold the Dark and Rebel Ridge, Slayground looks like the film that brings both halves of his career together.
The cast
The ensemble is one of the most interesting A24 has assembled for a horror film in a while — an eclectic mix of dramatic heavyweights and comic performers that suggests the film may not play its scares entirely straight. The confirmed cast:
- Cory Michael Smith — the lead, playing the fugitive murder suspect; his first lead film role
- Imogen Poots — a Saulnier veteran, reuniting with the director after Green Room
- James Badge Dale (The Pacific, The Empty Man)
- Chase Sui Wonders (I Know What You Did Last Summer)
- Sophie Wilde (Talk to Me)
- Young Mazino (Beef)
- Stephen Root (Office Space)
- Matty Matheson (The Bear)
- Stanley Simons (The Iron Claw)
From October to Slayground: how the film got here
The project was announced in June 2025, when A24 revealed that Saulnier would write, direct, and produce a Halloween-set thriller then titled October, with Smith in the lead. Casting news followed through late 2025 — Wonders and Wilde, then Simons, Mazino, and Root, with Dale, Matheson, and Poots joining as production got underway. Filming took place in Vancouver from late September through early December 2025 under the working title Moustache, and A24 retitled the film to Slayground in September 2026 — dropping the month from the title even as the release skipped the month entirely.
| Film | Slayground |
| Studio | A24 |
| Writer / Director / Producer | Jeremy Saulnier |
| Theatrical release | January 29, 2027 |
| First full trailer | October 20, 2026 |
| Lead cast | Cory Michael Smith, Imogen Poots, James Badge Dale, Chase Sui Wonders, Sophie Wilde, Young Mazino, Stephen Root, Matty Matheson |
What it means and what’s next
The January 29, 2027 date plants Slayground in prime counter-programming territory — the first major horror release of the new year, arriving as awards-season prestige films thin out. It is a vote of confidence from A24, which is producing and financing the film itself, with Peete, Bush, and Skei Saulnier producing alongside the director.
There is also a strong chance audiences see the film before January: industry coverage has floated a world premiere at the Sundance Film Festival, a natural launchpad for A24 horror buzz. The bigger question is whether Slayground becomes Saulnier’s next Green Room — a genre breakout that cements him as one of the most reliable tension-builders in American film. The first full trailer, landing Tuesday, should tell us a great deal. Check back — we’ll break it down shot by shot.
Frequently asked questions
When does Slayground come out?
Slayground opens in theaters on January 29, 2027, distributed by A24.
What is Slayground about?
Cory Michael Smith plays a suspected mass murderer who escapes police custody and hides inside the haunted attraction where he works, as a massive manhunt closes in on Halloween night.
Who directed Slayground?
Jeremy Saulnier (Green Room, Rebel Ridge, Blue Ruin) wrote, directed, and produced the film. It was previously titled October.
Who is in the Slayground cast?
Cory Michael Smith leads an ensemble including Imogen Poots, James Badge Dale, Chase Sui Wonders, Sophie Wilde, Young Mazino, Stephen Root, Matty Matheson, and Stanley Simons.
When does the Slayground trailer come out?
The first full trailer arrives Tuesday, October 20, 2026, one day after A24 revealed the teaser poster and release date.