Move over, big-budget blockbusters—there's a new horror obsession taking over streaming, and it's led by Deadpool & Wolverine star Dafne Keen. The supernatural thriller Whistle has quietly become one of the most talked-about genre hits of May 2026, thanks to a simple but terrifying hook: an ancient Aztec Death Whistle that reveals how you'll die.
According to FlixPatrol, Whistle entered the AMC+ Amazon Channels U.S. chart at No. 6 on May 9, jumped to No. 2 the next day, and then hit No. 1 on May 11—where it stayed through May 13. That three-day hold at the top is a big deal, because AMC+ horror audiences are known for being intentional viewers who seek out specific scares. The film's success on AMC+ is a clear sign that word-of-mouth is driving its popularity, especially after a modest box office run earlier this year.
But the U.S. isn't the only market feeling the whistle's call. In the UK, the movie climbed to No. 2 on Rakuten TV on May 10, hit No. 1 on May 11, and remained in the top 5 for days. It also held No. 3 on Catchplay rentals in Indonesia for a full week, reached No. 4 on Chili in Poland, and hit No. 7 on Google in the Netherlands, Nicaragua, and Venezuela. This international traction—combining subscription interest with paid rentals—is a classic sign of a horror hit that's spreading through pure buzz.
Directed by Corin Hardy (The Nun), Whistle stars Dafne Keen alongside Sophie Nélisse, Sky Yang, Jhaleil Swaby, Ali Skovbye, Michelle Fairley, and Nick Frost. The plot is as simple as it is chilling: a group of high school misfits discovers an ancient Aztec Death Whistle, and blowing it summons the sound and vision of their own future deaths. It's a premise that sells itself in one sentence, and that's exactly why audiences are flocking to it.
For fans of supernatural horror, Whistle offers a fresh twist on the cursed-object trope. If you're looking for more scares, check out our review of Evil Dead Burn, which we called a bloody, hilarious triumph for horror's best franchise. And if you're in the mood for something different, the BBC cop drama Blue Lights is becoming a new streaming obsession.
The film's streaming success is especially notable given its box office performance. Whistle opened in limited theaters on February 6, 2026, earning just $705,080 from 1,200 screens. It finished with about $1.25 million domestically and $4.69 million worldwide, against an estimated $2 million budget. On Rotten Tomatoes, it holds a 64% critics score from 114 reviews and a 54% audience score, suggesting that while general viewers are divided, a specific niche audience appreciates its craft.
This streaming rebound positions Whistle as an undisputed win for its creators, proving that a low-budget horror film with a strong concept can still dominate in the streaming era. Whether you're a fan of Dafne Keen or just love a good supernatural scare, Whistle is the horror hit you need to watch right now on AMC+.
