Wedding Guest Attire: Ask Guests to Attend Wedding in Costume?

Q:

We are planning a medieval wedding, and would like our guests to dress in period costumes. Is it acceptable to ask our wedding guests to dress up in costume?

A:

It is definitely ok to ask, but you can't exactly "require" it -- especially if you want people who may not be able to afford or otherwise get their hands on an appropriate costume to show up! Think of it as a "Black Tie Optional" event, where ideally you would like your guests to come dressed in ultra-formal attire, but you won't make them unwelcome if they don't. Perhaps you can provide some inexpensive costume props at your reception for those who show up without medieval garb.