'High School Musical 2' is the second film in the High School Musical series. The World Premiere took place on August 17, 2007 at Disneyland, in Anaheim, California. The primary cast, including Zac Efron, Lucas Grabeel, Vanessa Hudgens, and Ashley Tisdale, attended the event. The film debuted on television on August 17, 2007, on Disney Channel in the U.S., and on Family in Canada.In the second installment of the Disney franchise, high school student Troy Bolton stresses over getting a job, with the price of college expenses looming on his mind, as well as trying to make sure he and Gabriella Montez are able to stay together all summer.The premiere was seen by a total of over 18 million viewers in the United States which is almost 10 million more than its predecessor, making it the highest-rated Disney Channel Movie at the time of its airing.