Trivia: Mark Consuelos, who plays Ian Cox, had a lot of difficulty filming the scenes with Mr. Fuzzypants because in real life he has an allergy to cats. The actor's disgusted reactions where he is dealing with the cat are genuine.
Trivia: The film was originally written to be an introspective, existential dramedy geared towards adults about a troubled man who is turned into a cat. As originally planned, the cat also wouldn't speak/the audience wouldn't hear his thoughts. However, after a change in leadership at the studio, the film was rewritten into a more generic family movie.