Any tips, tricks or help to get Meryl Streep's autograph?

[Vertelles]

I really admire Meryl Streep and i'm dreaming to get her autograph. But I guess I need a miracle to get it. The only way for me it's TTM. I know I won't meet her in person. But now i don't even know which address to use or what to write her, that she would sign anything for me. Especially now, after Mamma Mia! she will receive much more fan letters...
What should i do? All the help will be appreciated {love}