Disney got fans ready to “Bop To The Top” ahead of Thursday night’s “Disney Family Singalong”.

In a teaser 30-second clip, Kenny Ortega and most of the original “High School Musical” cast sang “We’re All In This Together” from their homes all across the U.S.

Vanessa Hudgens, Ashley Tisdale, Corbin Bleu, Lucas Grabeel, Monique Coleman and director Ortega will also sing some of your favourite tunes from the beloved film, with a special appearance from Troy Bolton himself, Zac Efron.

Hudgens and Tisdale each posted bloopers from their attempts contributing to the singalong.

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Looool outtake.

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Efron introduced the cast before they sang “We’re All In This Together”.

“Hi, everyone. I hope that you’re safe and that you’re healthy and that you’re doing as well as possible during these unprecedented times,” Efron said.

“It’s my greatest pleasure to introduce a musical performance by some of my oldest friends and some new ones,” he added. “I hope that you enjoy, and remember, we are all in this together.”

RELATED: ‘High School Musical’ Cast To Reunite For ‘Disney Family Singalong’: Zac Efron, Vanessa Hudgens and More

Efron reportedly had scheduling issues with the reunion so he couldn’t perform and only was able to tape the intro. However, “HSM” fans were not happy that they waited to see him and all they got was a few seconds.

Cast members from other Disney Channel Orginal Movies like “Descendants”, “Zombies” and “High School Musical: The Musical: The Series”, were also featured in Thursday night’s special.

The singalong included performances by Ariana Grande, Demi Lovato, Elle Fanning, John Stamos, Auli’i Cravalho, Josh Gad, Donny Osmond, Amber Riley, Jordan Fisher, Derek Hough, Christina Aguilera, Erin Andrews, Josh Groban, Darren Criss and more, all from their homes.

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