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.

Efron, of course, rose to fame in the mid-2000s as the leading man of Disney's High School Musical trilogy, which saw him ...

Before Vanessa Hudgens wowed fans with her outstanding vocals and dance moves playing Gabriella Montez — Troy Bolton's better ...

However, transforming the iconic Phantom of the Opera into a franchise might be a tall order, even for the man behind the ...

The actor, who now appears on Tyler Perry's 'Sistas,' says he and Efron shared similar interests as teens on the sets of the Disney movies Alexandra Schonfeld is a features writer at PEOPLE.

One High School Musical cast member in particular shared his love for the dance: Bart Johnson, who played Coach Bolton in the movies. Take a look at how fans reacted on social media.

Phoebe Dynevor was a Zac Efron fan long before the two filmed a movie together. During a visit to the Today show on Thursday, ...