So I just sat down to write the list for the rehearsal dinner and there are a lot more people than I originally thought. We have a large wedding party which already ups the numbers. My question is... do I have to invite the wedding party's significant others?? I know it would be really nice but with them and out of town guests it is getting to be a lot and the rehearsal is in 17 days! PS. we are not sending any type of invitations for this (all word of mouth).