High School Musical: The Concert expanded the Disney Channel franchise that had previously produced a triple-platinum selling soundtrack and had planned a movie sequel.
The films' original cast members Corbin Bleu, Ashley Tisdale, Lucas Grabeel, Monique Coleman and Vanessa Hudgens took part in the tour, except for Zac Efron, who had previous engagement filming Hairspray, making him unavailable to join the tour.
Taking Efron's place was Drew Seeley, who was Efron's singing voice in the first film.
The concert typically ran two and a half hours (150 minutes) including the opening act and intermission.
The concert CD/DVD came from a performance in Houston, Texas on December 18, 2006 at the Toyota Center. On May 1, 2007, it was released on both CD and DVD together.