It says on Rupert's official website:

Contact Rupert
You can currently write to Rupert at:

C/o Nigel Grint
PO BOX 170
Hertford
SG14 3ZG

OR

Rupert Grint
c/o Hamilton Hodell
Fifth Floor
66-68 Margaret Street
London
W1W 8SR
United Kingdom

I have a Darren Shan one called "Sons of Destiny" (once you have read this, you will get the name of the book) and I also won a competition to get some signed stuff by him

Message the myspace and ask if they have an email address for fans. This way, you can still get an autograph for free and messaging and emailing is the same thing

These are sent out as pre-prints, you need to see them in person, as I did {thumb2}

I went on the UK Dancing On Ice tour, so I met quite a lot of people and they signed my programme The almighty Torvill and Dean Bonnie Langford Jake Wall Matt Evers Melanie Lambert Kristina Lenko Fred Palascak Karen Barber Robin Cousins Needless to say, these are all ice dancers, or were in DOI Uk [...

If you want a reply from a celebrity via e-mail, then you can't just put: Dear Pierce Brosnan The film was good -Name- They're unlikely to reply to that, as it looks like or has been copied and pasted. It should be like a letter Here's how one should be, and just say they're your favorite actor etc ...

Torvill and Dean
In person
Come on me! {thumb2}

I don't mind

The celebrity does what they want, I can't force them to so I don't really care

* indicates professional ice skater. In person: Jayne Torvill* Christopher Dean* Bonnie Langford Jake Wall Matt Evers* Melanie Lambert* Kristina Lenko* Fred Palascak* Karen Barber* Robin Cousins* Personalised Clare Buckfield Matt Evers (again :D) Through Post Everyone except in person Gordon Ramsay...