Thora Birch was paid a highly publicized seven-figure salary, due to her recent acclaimed appearance in American Beauty (1999).
In the book, Liz, Alex, Frankie and Jeff were trapped in an abandoned cellar. In the film, Liz, Mike, Geoff and Frankie are trapped in an abandoned underground nuclear fallout shelter.
In 2019 Laurence Fox talked about the shower scene in this movie. "On my first day ever as an actor, I had to get my privates out in front of Keira Knightley in a thriller called 'The Hole'. The stage direction was: 'He's naked and having a shower, she hands him a towel and he puts it around his neck.' You get a good old glance of my c***," he said.