Hitting the cabin house invasion was a very real fear for Rupert Grint

In an interview with Rolling Stone, Rupert Grint explained how much he enjoys working with Shyamalan, referencing the fateful day the director visited the set of 'Harry Potter' and met Grint for the first time. He mentioned that when the director approached him about "Knock at the Cabin", the talk was "pretty vague, which is kind of his style". However, Grint knew he wanted to take on the role because the subject touched on his "biggest fears: the end of the world and home invasions". The actor recalls the nerve-wracking incident that sowed the seeds of his completely rational anxiety:

"My house was broken into a few years ago — and I saw the guy come in. I was looking at 'The Irishman' and I could see, through the bedroom door , this guy in my living room, on all fours, looking for things. In the end, he just took some Kit Kats. That's all he got. He was also wearing my coat, which was a weird experience. It kind of sticks with you, almost like PTSD. It really froze me. You don't know if he has a gun or what his intentions are. The movie kinda triggers that."< /p>

The would-be burglar also didn't break in with the blunt and stabbing weapons that Redmond and his team use in "Knock at the Cabin." Grint mentioned that he "got in pretty easily" and probably didn't even know the owner's famous identity. Perhaps acting in Shyamalan's film allowed Grint to therapeutically mirror this harrowing situation, though his character's intentions are far more sinister than the search for Kit Kats.