Fan Clubs for actors

I have done a search on the internet to get an address to mail something to Jim Carrey. He is a funny guy. A little bit to much at times but funny.
My older guy (6) is a spitting image of him from In Living Color and I want to send a letter with a pic. My DH and I crack up hysterical from it and he doesnt know what he is doing that is so funny, which makes it even funnier. He even makes my younger guy laugh when he is crying but to a point where he is crying from laughter.