I am writing a stage play and would like to express my desires for casting and costuming of the characters. For instance, a historical character is of Irish ancestry (thus an actor with red hair and a convincing Irish accent would be desired) and every portrait I've seen of them has them wearing a certain style of clothing. As a playwright, I'd like to express that somehow in the play script in order to aid the director.
Is there a typical way to do this within the play script? Some sort of appendix or something? Or would I just write a document separate from the script and give it to the director with the script?