I've already written it, and printed it out. Do I just put it an envelope and send it, or are there rules and conventions I might overlook, such as
extra required documents for the talent agency?

Thanks!

Are these still good? Also, if I want to write a fanletter just to her, not related to Nashville, can I still the address below? Which one has the highest chance of success? Hayden Panettiere "Nashville - Season 1" P.O. Box 3000 Neenah, WI 54957 USA Hayden Panettiere William Morris Agency ...