"I just love that we all still love each other and love hanging out with each other and have that connection, you know?" Tisdale shared with ET. "It was a really special moment in our lives."
Tisdale and her HSM co-stars -- Vanessa Hudgens, Lucas Grabeel, Monique Coleman, and Corbin Bleu -- reunited at East High to film the upcoming reunion special. Star Zac Efron is also set to appear in a prerecorded message to the show's fans.
"Nobody thought it was going to be as successful as it was," Tisdale shared. "It was really, purely because of the fans that it was that successful and the fact that they've supported us throughout the years has been amazing."