Vanessa Hudgens

Vanessa Hudgens

Vanessa Hudgens still can't believe Ashley Tisdale is getting married.

The 'High School Musical' actress is among those helping her former co-star, 28, celebrate her bachelorette party in Miami, Florida this weekend, ahead of wedding to Christopher French this summer, and was extremely excited ahead of the festivities.

Shortly before jetting to Florida, the 'Spring Breakers' star told PEOPLE.com: "Ashley's bachelorette party will be my first one.

"It's so exciting. And it's so crazy because I just think of us as having fun and being silly and the fact that she is getting married, my mind is kind of exploding."

The girls kicked off Ashley's pre-wedding celebrations at the Purdy Lounge on Thursday night (15.05.14) and enjoyed a boat party on Friday night (16.05.14).

Christopher proposed to Ashley last August after only eight months of dating, but she knew he was "the one" as soon as they met.

She said: "I was like, 'OK, this is the guy.' And he knew the same thing. It was just this feeling that it doesn't get any better. I can't explain it! It's just natural between us."

Vanessa is currently dating Austin Butler, but was previously in a long-term relationship with her and Ashley's other co-star Zac Efron, who sought treatment in rehab for a cocaine addiction last year.