Well, this party was unexpected! The cast of High School Musical were busy over Halloween, planning a reunion that would cause any Disney fan to freak out.

Ashley Tisdale, Vanessa Hudgens, Monique Coleman and Corbin Bleu all made their way to the same Halloween party on Saturday night. 

And once again the gang all proved they were still best friends as they all posed together in group shots. #SquadGoals.

"The crew at @VanessaHudgens amazing Halloween party last night," HSM dancer Jason Williams wrote on Instagram. "#highschoolMusical #Reunion!!!! #squad #squadgoals #Halloween #hollywood #wildcats."

Ashley donned a queen of hearts outfit on the night, while Vanessa channelled Alice from Alice in Wonderland. 

Corbin Bleu decided to rock the Lenny Kravitz look and Monique Colemanwent as Donnie from Clueless. 

It's good to see that even though it's been nine years since the first High School Musical premiered, the crew all manage to stay in contact.

"I continue to see all the guys from High School," Zac Efron told E! News recently.

"Every time we do…there's just this look between us. It's so cool because we never forget a single moment of that experience."