Actors Daniel Radcliffe, Rupert Grint, Jessie Cave, and Tom Felton were interviewed by a young fan on the
Harry Potter and the Deathly Hallows set for the UK's (Channel 4's)
the Paul O'Grady show. Although the interviewer messed up just a bit with Rupert's questioning about love potions, he was quite good with the rest. It can be seen below.
Source:
RupertGrint.net