The 26-year-old actor sent his apologies to fans who wanted him to be part of it.
“Thanks for organizing the #HSMreunion @gimmemotalk! Sorry I can’t be there, but I support your cause. Proud of you Mo!” Zac wrote on WhoSay.
Monique Coleman, who organized the reunion to raise funds for the Gimme Mo Foundation, replied via Twitter, “I’ll always love u @ZacEfron Thx for ur support!! I’m beyond proud of U #wildcat U know there’s an open seat if u can make it #HSMreunion.”
ARE YOU SAD that Zac aka Troy Bolton won’t be at the reunion?