"I'm trying to pull him back from the edge of insanity. How do you stand up and tell someone they're wrong when they've given you everything you have?" said Radcliffe.
First footage of 'X-Men: Apocalypse,' 'Deadpool' shown at Comic-Con →
He says Miss Rowling would "come up with something far more interesting or exciting than anything we can ever predict or imagine."
Magical time for Potter fans →