Kathryn Newton and Lana Condor reveal the gruelling days that pushed them to the brink on The Devil's Mouth

If you like your summer movies wet, loud, and borderline panic-inducing, Prime Video has one brewing. The Devil's Mouth is a survival horror set in the kind of underwater nightmare where every breath counts and not much else does. And based on what the cast just said, making it was basically a marathon in a fish tank.Underwater and under pressureDuring an ExtraTV interview posted June 28, 2026, Kathryn Newton and Lana Condor talked about a shoot that sounds like it chewed up their off-hours and most of their nerves. Newton joked that the work was so full-on they barely had time for small talk, let alone gossip about other shows. Condor went even harder, describing a production that rarely left the water. According to her, only a handful of scenes were on land; most days were spent in or under the water, sometimes parked on the bottom for long stretches, breathing through respirators and taking direction between dives. That is not your average day at the office. "It was all consuming." Newton said the set was so intense they did not even have time to chat about The Summer I Turned Pretty. Condor called the experience all-consuming and admitted she was in a constant state of fear throughout filming. She described days spent underwater for long periods, using respirators, with only a few scenes shot on land — physically and mentally exhausting became the baseline. The pair also shouted out co-star Gavin Casalegno, who they compared to a golden retriever — make of that energy what you will. All of this came out in an ExtraTV chat tied to Prime Video, posted June 28, 2026. So what is this thing?The Devil's Mouth blends survival horror with a YA edge: a group of college friends heads to Thailand, winds up trapped in an underwater cave, and discovers they are not alone — a bull shark is in the mix. It is shaping up to be one of Prime Video's more intense summer plays, the kind where the actors ’ on-set misery translates directly into on-screen dread. Short version: expect tight spaces, bad decisions, and a lot of holding your breath — them and you.

Kathryn Newton and Lana Condor reveal the gruelling days that pushed them to the brink on The Devil's Mouth

Read also