I was appearing as a guest on a Saturday show at the BBC in London on 13th May and I bumped into Daniel Radcliffe. Actually I went out of my way (2 floors in the elevator!!) to bump into him
A really helpful guy (Evan? something) from the "photo archive" at the BBC gave me a couple of photos to get signed, and Daniel graciously signed them both for my charity. (BTW - I was totally amazed how small he was!!!!) He signed one of them in black marker, and one in metallic pen.
You might think I am totally stupid, but I have been putting off posting this because I sent one of the photos to Robert Pattinson (Cedric on the HP films - as he was on the photo with Daniel) - to ask if he could co-sign it. I think if he will, then the value of the picture at auction must be increased.
To date I have not yet got it back
It must be be only a couple of weeks, but I am already regretting sending it off IMDB: http://www.imdb.com/name/nm0705356/
Wish me luck at getting the other photo back
As far as I am aware Robert Pattinson is supposed to be a good responder, so fingers-crossed 
All autos are still going into my next charity aution which will be held in the next couple of months.
Cheers
Ian
fantastic success! i really hope you get roberts reply, im sure he will reply. This will raise alot of money at your charity auction!