So you want to write to your favorite star? But you're not sure what to say....or will it even get ? Should you even bother?
Sure! Give it a shot! All you're out is a stamp and some time...and it's all worth it whether you hear back from them or not.
Some appreciate fan mail more than others however. (Patrick Swayze for instance never
responds to fan mail, nor does he have anyone responding for him). Where it goes that I don't
know, but I know he does not read most of them himself. So, with that in mind..here are a f few pointers:
- Keep it short definately. Not more than one page. Typed is preferrable as they do not have the time, nor want to try, to decipher someones handwriting, as well intended and heartfelt as the writer may be.
- They are used to the world referring to them by name; so using their first name is fine.
When I have written folks, I use the Microsoft Professional Letter creator templetes. This 
allows you to include your return address in the footer of the letter without having it be invasive to the letter itself. Most newer pc's will have this in their microsoft program package. Very easy to use and walks you right through the set up.
- Always use a basic font set on 12 - 14; no bigger no smaller. Also making sure your paragraphs are definative in where they stop and start is a must; either use the block or inset type of paragraph so that it is easily read and understood.
- Demand nothing. Tell them how much you enjoy thier performances (don't use the word acting) and definately do not refer to any particular character as being 'them'. Don't tell them all sorts of mushy stuff...they could care less. What they want to hear is how they are valued as a performer and what sort of wonderful screen presence they have or their talent in developing a character.
- Do not 'delegate' how you want something signed. They know your name from your letter- let the rest of the way it is signed be their decision. If they feel like signing it 'affectionately', they will. If not, they won't. After all, how much 'affection' can you feel for someone you've never met?? Think about it...
- Always, always include a self addressed, stamped envelope. And don't just put one stamp on it, put too or three, especially if you are asking (KEY WORD THERE- ask nicely, NEVER demand) for a picture back. If you give them the means by which to send it, you're more likely to get something in return. Your odds increase if you send them a picture you already have.
- DEFIANTELY do not focus on only 'older' characters / films. Make sure you've done your homework, and mention the newer things they've done, even if just in passing. If an older film is one of your favorites, fine, mention it, but also make sure they know that you know they are still around and strong performers in entertainment today. HOWEVER, don't lie about having seen something you haven't because you just never know when they may email you back or something asking your opinion.
- FINALLY, allow plenty of time...like several months for a response before you even start to get worried that you may not be receiving an answer at all. They (and the folks who help them out with fan mail) are very busy people. Always make sure you provide more than one way that they can respond (ie: add your email address as well as the self addressed stamped envelope you provide). And keep in mind that you may not receive one back at all...after all, it's not an obligation on their part even if you do provide a SASE.
Hope that helps and best of luck!!