Radcliffe has appeared naked before, on stage during productions of Equus at London's West End and New York's Broadway, but this will be a first for him on screen.
'People who pooh-pooh privacy are like those kids who are so busy getting the right selfie that they back all the way off the edge off the cliff, and then look all surprised on the way down,' says Mitali Saran.
'How did Hermoine fall for Weasley?' 20 years after Harry Potter made his debut, Vanita Kohli-Khandekar has some questions for its author