This weekend, Harry Potter fans invaded Orlando for LeakyCon, a four-day convention celebrating the world and fandom around everyone’s favorite wizard. We’ve got tons of coverage coming at you from the event — Potter costumes, tattoos and wizard rock bands — but today’s biggest ticket gathering was the performance by Team Starkid, creators of the YouTube hit A Very Potter Musical.

After the jump, watch a teaser clip with Darren Criss, who played Harry Potter in the viral video and also plays Blaine Anderson on ‘Glee,’ singing ‘Not Alone’ for the wizarding crowd. We’ve also got a few preview photos from their panel.