The High School Musical couple is no more!

According to various online sources, Zac Efron (23) and Vanessa Hudgens (she turns 22 tomorrow) have broken up after over three years together.

Sources claim that the picture-perfect twosome simply grew up and grew apart. And of course, they're "still friends."

We've reached out to both stars' publicists for a comment and are waiting to hear back...

The actors met in 2005 while making the first HSM flick. Since then, Efron's film career has taken off while Hudgens' remains stagnant.

Think the couple is done for good or will they eventually reunite?