Lily Collins (Halle Anderson) previously costarred with other actors from this movie: Nathan Lane (Carl Kapinas) in Mirror Mirror (2012) and Greg Kinnear (Dr. Tom Sherwood) in Stuck In Love (2012), which both films came out the same year.
When Linda and Jason are first in the boys dressing room discussing the play, there is a poster behind Linda which is misspelled - it reads KIGNSTON PLAYERS.