Buddy (2026): Casper Kelly's Killer-Unicorn Sundance Horror, Explained

Buddy premiered in the Midnight section of the 2026 Sundance Film Festival on January 22 and was acquired by Roadside Attractions and Saban Films for a U.S. theatrical release on September 4, 2026. It runs 95 minutes and is expected to land a hard R.

It's the feature debut of Casper Kelly, written by Kelly and Jamie King and produced by BoulderLight Pictures — the genre shop behind a run of lean, high-concept horror films. Kelly isn't a first-timer in the broad sense; he's spent years writing for Adult Swim. This is just the first time he's had a feature-length canvas, and he picked a swing-for-the-fences one.

There are two worlds. In one, it's the late 1990s and a group of children live inside the episodic reality of "It's Buddy!", a Barney-style kids' show hosted by Buddy — a giant orange humanoid unicorn with a purple heart on his chest — presiding over a clubhouse full of talking household objects and an anthropomorphic rabbit roommate. In the other, Grace (Cristin Milioti) is living an ordinary suburban life with her husband (Topher Grace) and two kids, nagged by the sense that something is profoundly wrong.

Buddy runs his show like a benevolent host right up until a child steps out of line — and then the squeaky-clean facade drops and he turns violent. When one of the kids vanishes and the others start to defy him, he sends them on a perilous journey toward the mythical Diamond City. How the show world and the suburban world fit together is the engine of the film, and it's the one thing worth going in cold on.

Keegan-Michael Key voices Buddy. Michael Shannon and Patton Oswalt round out a cast far more decorated than a movie about a killer unicorn has any right to have.

If the name doesn't land, the work will. Kelly wrote Too Many Cooks, the 2014 Adult Swim short that started as a parody of '80s sitcom credits and mutated into eleven looping, escalating minutes of horror that broke containment and went genuinely viral. He also co-created "Your Pretty Face Is Going to Hell." His whole register is the warm, familiar format — the sitcom intro, the kids' show — pushed until it curdles.

That's the lineage that makes Buddy worth watching, and it's the same one that produced Backrooms: an internet-native creator with a specific, unmistakable sensibility getting handed a real budget and a real cast. The risk is identical too — the thing that kills at eleven minutes has to survive being stretched to feature length. Too Many Cooks knew exactly when to stop. The whole bet on Buddy is whether Kelly's instinct for the curdle scales.

Both, by design. This is horror-comedy in the truest sense — Sundance reviews landed on words like "batshit," "surreal," and "equal parts funny and messed up," with critics noting the horror still cuts through the absurdity. Don't expect a jump-scare machine; expect the specific dread of a safe, beloved thing turning on you, played for laughs right up until it isn't.

The craft people keep flagging is the practical work. Buddy is a physical puppet creation, not a CG cartoon, and the late-'90s children's-TV aesthetic is recreated in loving, unsettling detail. Practical effects are doing a lot of the heavy lifting, which is usually a good sign for a horror-comedy — it grounds the absurd.

A fair warning for some viewers: the premise puts children in real danger, and the film does not treat that as off-limits. It earns its R.

Buddy is the newest entry in a small, reliable tradition: take the iconography of childhood safety and weaponize it. The closest tonal cousin is M3GAN, which mined the same vein of a friendly companion turned lethal, wrapped it in satire, and became a hit doing it. For the retro-broadcast texture, Late Night with the Devil is the obvious touchstone: vintage television as a delivery system for horror.

On tone, the comparisons that fit are the funny-but-brutal ones — Ready or Not for letting a horror premise be genuinely funny without softening the violence, and The Cabin in the Woods for taking a familiar format apart from the inside. Buddy is doing to the children's show what Cabin did to the slasher.