Morris is played by the real life Sam, Rich's friend from college. And the actor playing the radio interviewer is Rich's real life younger brother David,
Rich's brother Dave appeared in the movie as the DJ and Dave's daughter played Rich's sister and Dave's son played the teenage Rich.
The girlfriend is actually a compliation of a couple of different girl's in Rich's life.
Amy Shultz who plays Amy Grant is the wife of the director
In the movie, Rich's dad mentions Rich getting all four wheels of a tractor stuck in holes. Rich's brother in the commentary says this is based on a real incident, but it was a car, not a tractor.