A shark-infused survival thriller directed by Jeff Wadlow premieres on Amazon Prime Video on July 29, 2026, and its lead actor knows her way around a dark room. The Devil's Mouth, an American survival thriller with a runtime of one hour and 45 minutes, sends five college friends into an underwater cave system along the coast of Thailand — where the sightseeing goes badly wrong. Kathryn Newton, now seven horror films into her career, plays Sara, the fifth wheel on a college friend group's vacation that turns lethal.

Newton was 15 when she led Paranormal Activity 4 in 2012. Christopher Landon, who wrote that film, provided a testimonial to Wadlow before the director cast Newton in The Devil's Mouth — a through-line from her first horror role to this one. Her genre credits have since stacked up: Freaky, Lisa Frankenstein, Abigail, the upcoming Ready or Not 2: Here I Come, and a project titled White Elephant. The Hollywood Reporter published the interview covering her full filmography on July 29, 2026.

The shoot itself was physical. Newton told Variety that filming The Devil's Mouth left her "bleeding and banged up," and the production employed stunt performers. Variety reported her account on July 21, 2026. She had two days off between wrapping Ready or Not 2 — directed by the filmmaking collective Radio Silence — and flying to Thailand to start work on Wadlow's film.

Lana Condor and Nico Hiraga co-star. Deadline confirmed Hiraga's casting in August 2025.

Beyond horror, Newton reprises her role as Cassie Lang — Scott Lang's daughter, last seen in the Ant-Man films — in Marvel Studios' Avengers: Doomsday, directed by the Russo brothers, who previously helmed Avengers: Infinity War and Endgame.

And if the film and television credits are not enough: Newton is widely considered Hollywood's best golfer.

For Newton, The Devil's Mouth arrives in the middle of a packed stretch — a horror film on streaming, a Marvel blockbuster on the theatrical calendar, and a sequel (Ready or Not 2) somewhere in between. The genre work keeps finding her. The cave, the sharks, and the five friends trapped underground are just the latest in a career built on things going bump in the dark.