Fan mail question

i can't seem to find a previous thread on this. I want to send a whole cast individual letters, art, etc. And I'm planning to put them all in one big envelope and mail it together (each letter in an individual envelope addressed to each person, of course). Who should I send this to? The stage manager? I have a feeling that sending this to one specific actor and asking the actor to pass it out to each cast member is not a good idea lol.....

Address the whole package to the Production Stage Manager and he/she will put the individual letters into the cast member's mailbox.