how to get an autograph

Hi! Does anyone know if it's possible to get an autograph from an actor who lives in the US by sending him a letter and asking him to send back an autograph? Do they usually write back or is it a waste of time? Has anyone tried it?

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They’re all ( maybe not all of them ) mostly pot-heads and bar-flies and wouldn’t miss a chance to ‘toot’ while shooting (you know, to snort the freebase, that “big-C rich man’s aspirin” )
Some of them even implant the fine plastic tubes into their nostrils when they’re not able to ‘huff and puff’ any longer because of their badly bruised mucous membrane in nasal passages.
Do you think they really care about some autographs? I don’t think so. :)

Everybody knows that the so-called stars have autographs already pre-printed with their signature. The only one way to make sure that it is a genuine article is to actually see them sign something in front of you.

thats true but what do you need your autograph for???
of course some of them are worth, more with the time, but only if you have it originally written, as terri said.