I have a signed copy of The Log by Craig Charles (best known as Lister from Red Dwarf), though it was a gift, so I never actually met him myself.

... though funny story, I could have met him a couple of times at a gig he did in my hometown.

The first was when I was walking to the venue, no-one else around somehow, and there was this guy jumping up and down on the spot not too far off near the venue, which is not what you generally see someone doing in the street. As I got closer I must have looked away for a second because when I looked back, he was gone.

When he came on stage I realised it had been him warming up outside, getting the blood flowing, etc. He's fairly distinctive in appearance, so you'd think I ought to have realised sooner, but I don't think I recognised him outside because 1) I usually see him on TV and 2) I genuinely didn't expect to see him there.

Then later, after the gig, he was outside the stage door as I walked by on the street, but alas, I am an introvert and he was still "on" which was a bit too high energy for me, so I didn't take the opportunity to join the other fans who were getting an outdoor encore.