Trivia: In the scene with the young Willy Wonka eating a box of chocolates, he is writing down in a notebook a description of each chocolate he eats. When Roald Dahl was at boarding school there was a Cadbury's factory nearby that used the pupils as testers for their new chocolate, and they were asked to write down their comments in much the same way. This is mentioned in his book Boy.
Trivia: During the sequence in the "Television Room", there are two references to "2001 A Space Odyssey". First, the Oompa-Loompa is watching the scene where the primates are circling around the monolith. Second, as Willy Wonka starts the machine "Also Sprach Zarathustra" by Richard Strauss is played.
Trivia: The squirrels in the movie are not CGI, but they're actually weird trained squirrels. There are obviously some parts with CGI, like when they carry Veruca into the pit, but they had about 40 trained squirrels. When they were finished, they gave most of the squirrels to people who wanted them as pets. The others went to zoos.