I wonder what happens if a couple gets a license and then decides not to go through with the ceremony when the time comes. Are they still married? Or do they have to file for a divorce? Are there provisions for an 'annulment' from a legal perspective?

I guess there are actual annulments, but I always thought of those from a religious perspective, not a legal one. I can't fathom that the requirements are the same as presumably the religious one stipulates no intercourss.