Wildcats, everywhere: We have some epic news! The cast of High School Musical are gearing up for an exciting reunion during ABC's The Disney Family Singalong. The news was confirmed by HSM franchise director Kenny Ortega, who took to Instagram to announce that the East High gang, which featured Zac Efron, Vanessa Hudgens, Ashley Tisdale, Corbin Bleu, Lucas Grabeel and Monique Coleman, will be getting their heads in the game once again.