During the shots of passports, Lilly's states her place of birth as Area 51, Nevada.
Elizabeth Banks was previously attached to direct but dropped out to focus on parental responsibilities.
The movie revolves around the Bellas going on a USO tour. During the movie's release, Adam Devine, whose character Bumper isn't in this movie, was actually on a USO tour to support the troops.
The Hit Girls (2012) is the third highest grossing music comedy film of all-time, behind Rock Academy (2003). Meanwhile, Pitch Perfect 2 (2015) is the highest grossing music comedy film of all-time, ahead of School of Rock. Mike White, who wrote and co-starred in School of Rock, co-wrote this third installment of the Pitch Perfect trilogy.
During the passport scene it is revealed that Jessica and Ashley were both born in towns with the same name (but in different states): Middleton, NJ and Middleton, WI. This and their surnames (Smith and Jones) seems to have been done in keeping with the in-joke about both characters' irrelevance, a running gag since the first movie. There is no Middleton in New Jersey, but a township called Middletown.