A lot has changed since High School Musical debuted on Disney Channel Jan. 20, 2006. Head back to East High to find out what Zac Efron, Vanessa Hudgens, Ashley Tisdale and more stars are up to now.

Zac Efron returns to his signature, 'High School Musical' hairstyle from 2006 while filming a new project in Los Angeles. The final movie in the iconic Disney trilogy turns 15 on Oct. 24.

PHOTOS High School Musical Cast: Where Are They Now? In addition to Efron, several HSM alum weighed in on social media, with Corbin Bleu channeling his inner Ms. Darbus with a simple ...

Monique Coleman celebrated her fellow Wildcats and High School Musical costars, Vanessa Hudgens and Ashley Tisdale on their journeys as mothers. The upcoming book "Disney High: The Untold Story of ...