With a nod to the talking portraits at Harry Potter's Hogwarts, Matt Mills - head of innovation at the Cambridge start-up Aurasma - showed the TED audience a picture of the famous Scot.
This is the shortest of the Potter movies at two hours, 10 minutes, but the tempo is exactly right, rising and falling as Harry's fortunes bring him back to Hogwarts in search of the last horcrux and the school becomes a battleground -- a war zone -- for the eternal fight between good and evil.
Singing songs about wizards, Quidditch and the Hogwarts School, the duo has been rocking bookstores and libraries across the U.S. "We'll play pretty much anywhere, " says Paul.