Disney Channel fans are the most excited for High School Musical 4, and one of the original High School Musical stars just surprised hopefuls at their audition. Corbin Bleu showed up at an open casting call for the movie at the Anaheim Convention Center, and we're seriously hoping this won't be the only way he gets involved with the new film.

The actor said that it was so exciting getting to meet a bunch of the kids who were auditioning.

"It was incredible to see how many people were coming out to be a part of the HSM experience. Just the excitement, it's very nostalgic and it's very beautiful to see that it still holds true," he said.

Ugh. All the feels. It's a testament to his love of the franchise how involved he's getting with the HSM4 audition process, and it's making us nostalgic too.

Click through the gallery to see then-and-now pics of the OG cast.

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