One of the best Harry Potter facts, the director of 'Harry Potter and the Prisoner of Azkaban' - Alfonso Cuaron, asked Radcliffe, Rupert and Watson to each write an essay about their roles for sake of better understanding them.

Guess what! Watson handed in 16 pages (she never fails to show the 'Hermione' inside her), Radcliffe a single page and finally Rupert refused to hand in anything entirely!

I hand out my paper in an exam when I don't usually know anything.
Shush! Nobody tell Rupert that.