Teddy's room in the movie is Jack's room in real life.
On April's bedroom wall, there's a poster for the film The Virgin Suicides - Verlorene Jugend (1999) which was directed by Gia Coppola's aunt Sofia Coppola.
The actors who played Teddy and Fred respectively each had a featured song in the soundtrack. T.M was written and performed by Jack Kilmer (Teddy) and Rock Star was written and performed by Nat Wolff (Fred) and his brother Alex.
Jacqueline de La Fontaine who plays April's mother, is director Gia Coppola's mother. Gia Coppola's cousin Bailey and great-aunt Talia Shire also appear in the film.
The off-screen judge who sentences Teddy to community service was voiced by Francis Ford Coppola.