First, don’t panic… While you should have a seasoned event professional on staff who would have foreseen this issue, you may not have had such a luxury. So here’s the facts to any late arrivals and unplanned guests. People may or may not include their plus one on the card when they send it back, circumstances change and you always have friends and family who are habitually late. When planning for your big day you have to include these minor set backs and shrug it off as something that happens and you cannot control. Make sure to never limit your space. The venue you choose should never be at max capacity to your guests. Cut them a break and leave some wiggle room. You should always have this discussion with your caterer when you are planning out your meal selection and they can guide you and let you know the appropriate amount of “extra” servings to allow for. If you are having seating cards and assigned tables, leave a few tables near the door marked as reserved, these can be used for late arrivals and unexpected guests. Though you didn’t know they were coming, you never want guests to feel that they are a burden and at the 11th hour you don’t want to scramble for seats. Always leave a few seating cards blank for these last minute write ins and have places set like you knew they’d show. If you don’t have an event planner, put SOMEONE ELSE in charge. This is your day and a friend or family member will willingly help out and escort unexpected guests to seats they can fill.