Are there auditions for High School Musical 3?

High School Musical 3: Senior Year is a 2008 American musical romantic comedy film directed by Kenny Ortega and written by Peter Barsocchini. It is the third and final installment in the High School Musical trilogy. The film stars Zac Efron, Vanessa Hudgens, Corbin Bleu, Monique Coleman, Lucas Grabeel, and Ashley Tisdale. The film was released in the United States on October 24, 2008.

There were auditions for the roles in the film, but they were held exclusively for actors and actresses who were already signed with the Disney Channel.