Anne Hathaway and Amy Adams were offered the role of Constance, but both declined due conflicting schedule for a superhero film. Hathaway was busy shooting The Dark Knight Rises and Adams was shooting Man of Steel. Malin Akerman, who appeared in Watchmen, was ultimately cast.
Taylor Swift was considered to play Sherrie, but Julianne Hough was cast.
Constantine Maroulis plays a record executive in this film. He originated the role of Drew Boley in the Broadway production and was nominated for the 2009 Tony Award for Best Leading Actor in a Musical for his performance.
Will Ferrell and Steve Carrell were considered to play Dennis Dupree.
Gwyneth Paltrow and Olivia Wilde were considered for the role of Constance Sack before Malin Akerman was cast.
All of the singers in the movie are using their own voices.
"Most of the main cast did 5 weeks of intense rehearsals before shooting began. They called it “Rock Star College”. They did vocal, dance and guitar work." --Collider