Watch: Rick Carlisle jams out on piano at Harrison Barnes' wedding

Warning: Story contains coarse language

Elite NBA head coach by day, talented pianist by night.

Dallas Mavericks bench boss Rick Carlisle attended Harrison Barnes' wedding Saturday night and treated the crowd - which included the likes of Kyrie Irving, Stephen Curry, Andre Iguodala, and Klay Thompson - to a piano performance.

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Classy.