Apologies for bumping an old topic (some forums don't like this so I'm not sure of the policy here)

Just write what you want to say to them. Say positive things and why you enjoy what they do (ie why you think they are a good actor/actress, singer etc. obviously dependent on the celeb) and be yourself. Don't try and write too much and say '...it would be great if you could please send me a signed pic', and remember to be polite and say thank you. Celebs are just like you and me so don't hold them in too high regard as they may be put off.

miss_astin your member name makes me think of Sean Astin, am I right?
Have you tried him yet? I'm about to do so, he is one of my favourite actors, and I just wanted to check if you had a success with him.

Talking about your question, I agree with LaceyChabertFan, just be honest and hope for the best,

The key to a success is just by writing what you REALLY think and feel. An artist or actor will always suss if you've just written the letter in a bid to get their autograph. It's best to pick out their best projects and emphasise how much you may have enjoyed them.

i've currently got 10 autographs since november, and i wanted to know if there was any convincing lines that i could put in a letter 2 celebs to make them want to always send me their autograph?