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In October, "School of Rock," the kick-ass rock comedy from Jack Black, director Richard Linklater, and a bunch of talented kids, including a pint-sized Miranda Cosgrove, will celebrate it's 10th anniversary. Crazy, we know.

Ahead of the joyous occasion, the cast and crew got together for an early celebration and reunion concert. Thankfully, a lot of it was captured in Instagram form, thanks mostly to Cosgrove.

Check out some photos from the reunion and a video from their rehearsal after the jump!

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