• Corbin Bleu, Ashley Tisdale, Vanessa Hudgens and Zac Efron attend 'High School Musical 3: Senior Year' photocall at the ME Hotel on October 3, 2008 in Madrid, Spain.

Corbin Bleu, Ashley Tisdale, Vanessa Hudgens and Zac Efron attend 'High School Musical 3: Senior Year' photocall at the ME Hotel on October 3, 2008 in Madrid, Spain. (Photo : Getty Images/Carlos Alvarez)

It's been 10 years since viewers sang to "We're All in This Together" in the first "High School Musical" film. Even though a decade has passed, it seems that the whole crew is still very much together and enjoying some mini reunions every now and then.

Wildcat boys Zac Efron, Lucas Grabeel and Corbin Bleu reunited in New York to support Bleu's Broadway show called "Holiday Inn Musical," in which he plays Fred Astaire.

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Efron shared a photo of the trio on Instagram and wrote, "[Lucas Grabeel] and I saw [Corbin Bleu] DANCE on AIR ala Fred Astaire last night. He tapped 'Firecracker' and lit the stage on [fire] with his moves! Check out #HolidayInnMusical #amazingshow #theboysareback." The last hashtag is in reference to his and Bleu's duet in "High School Musical 3."

Grabeel also took to social media to congratulate his friend and added, "So much love for these guys."

This mini reunion has sparked speculation about Efron's cameo appearance in "High School Musical 4," along with the other original cast members. In January this year, the main cast of "High School Musical" got together for a reunion special aired on Disney Channel. Efron was noticeably absent.

It's been rumored that some of the original Wildcats will appear in some capacity in "High School Musical 4," presumably as mentors to the younger generation of East High students.

Meanwhile, "High School Musical 4" will focus on a new generation of East High Wildcats and their rivalry with the West High Knights.

"'High School Musical' is part of Disney Channel's DNA," Disney Channel President Gary Marsh said about continuing the TV movie franchise. "It embodies all that we stand for. As a way of continuing to embrace that heritage, we're excited to announce 'the start of something new' as we launch a search for a new class of East High Wildcats to star in a fourth installment of the 'High School Musical' franchise."

Jeffrey Hornday will direct the movie as well as provide the choreography. Peter Barsocchini and Dan Berendsen will write the script.

There is no word yet as to the official release date, but casting for the film is underway.