I got married 2 years ago, and my wife and I paid for the wedding. Her parents kicked in some money to help, but they strictly volunteered; we never asked them for anything. I agree with the others here, and strongly urge you to talk to the parents of the bride to be before the plans move far along. Sometimes, people have expectations. Getting all of your cards on the table, and having a serious and frank discussion about the arrangements strike me as the single most important thing you can do, and the sooner the better. Just my .02.