Daniel Radcliffe appeared on Fuse TV recently, and thanks to Into the Pensieve, we have a 16 minute video from the show. While on the show, Dan said, "The only actor that knows anything about his character is Alan Rickman, who plays Snape. He knows the truth about Snape! He does! Yes!"
When asked if he tried to squeeze the truth about Snape out of Alan Rickman on any "crazy nights out," Dan said, "To be honest with you, I don't think I've had any crazy nights out with Alan Rickman, really."
thanx to veritaserum.com