I'm still really close to my ex-in-laws. Is it okay to invite them to my wedding?

When done for the right reasons, including former in-laws can be fine. If your ex-in-laws are still devoted grandparents to your children, or if you are very close friends, then it might be a nice idea to include them. But check with your fiancé(e) first. If inviting them will make him or her uncomfortable, don’t do it. And it’s always better not to invite ex-spouses.