One of the biggest points of contention when it comes to wedding planning is figuring out the guest list — especially deciding whether your friend's significant others should be included in the celebration. Or, if you're feeling extra generous, whether you should offer guests a plus-one. Our etiquette experts are here to clear the air about allowing your guests to bring dates to your big day.
It sounds like a cop-out but ultimately the decision to invite plus-ones is up to you and your budget. There's no clear-cut rule for these additional party-goers except that whatever you decide on should be universally applied to all guests. So that means that if you'd like to offer a plus-one to one friend, you need to give plus-ones to all, and visa versa. You are by no means, though, obligated to offer plus-ones to guests — doing so is a purely nice offer if your budget allows the added expense of extra guests.
As for inviting your friends and family's significant others, that's a bit more complicated. You should absolutely invite a guest's spouse if they're married and the same rule should be applied with guests who are engaged to be married. The murkier waters, though, is if a friend has a boyfriend or girlfriend you know well. This, again, is up to you. If you feel that they haven't been together too long, you can just invite your friend. Another option is to invite your friend with a plus-one (if you're offering plus-ones, and with the knowledge that she will be bringing along her boyfriend). If, on the other hand, your friend has been in a relationship for many years and they live together, you'll most likely want to invite the both of them.