Hi, Nat,

As soon as I started getting to know Michael, I sent him letters. :D
Still DO.... lol

I use to send all my mails to him via the theatre.
After writing his name, I'd put (Cast) right next to it to make sure there'd be no misunderstanding and that he would receive it.

However, there's no guarantee that he will return your
mail.
Oh...anyway, you might try to send him a return-address-envelope-with stamp....that way you might have some luck. :-)

Good Luck !

~Selina