I used Studio fan mail and received an autograph a few weeks backs.

I have met in person

Sean Astin
James Masters
Devon Murray
Jamie Waylett
Tom Felton (twice)
Daniel Logan
Christian Coulson
Bonnie Piesse
Jamie Yeates
Dean Stockwell
Bernard Hill
Alexis Denisof
Alan Cumming
Corin Nemec
John Rhys Davies
Anthony Head
Lawrence Makoare

That is all I think