She has a supporting role in Pitch Perfect.

In the upcoming comedy musical, Knapp will play Stacie, a girl who doesn't realize she sings in an overtly sexual manner. She'll star alongside a promising young cast that includes Anna Kendrick, Brittany Snow and Bridesmaids alum Rebel Wilson. The film is an adaptation of Mickey Rapkin's non-fiction novel of the same name which follows a college acappella group trying to place at competitions.