The film, called Walk Hard, is about a Johnny Cash-like rockabilly star named Dewey Cox played by John C. Reilly. 40-Year Old Virgin's Judd Apatow is the screenwriter.
According to Apatow: "It is based on movies like Ray, Walk the Line, Great Balls of Fire, and Selena. To prepare to write it we watched a ton of those films and we realized they are all the same movie. So we decided to create our own music-industry giant, Dewey Cox, and tell the world his story. Let's just say he goes to rehab a lot. He has a very addictive personality."