The movie has Mr. D's birthday being 1967, making him either 37 or 38 at the time of the movie. However, Ryan's birthday is Oct, 23, 1976, meaning he would have just turned 28 when the movie was released in February of 2005. This also makes this movie one of the few where Ryan plays a character older than himself.
Dylan mentions that Chase believes his family is akin to The Addams Family. John Astin, who appears as Stormin' Norman Warner, Dylan's grandfather, in this movie, starred as Gomez Addams in The Addams Family (1964).