Happy Thursday, Grey's Anatomy fans!

Just a few more hours until the 100th episode airs, and despite the deluge of hints, debates and Grey's Anatomy spoilers over the past month, we still don't know who's getting married - at least not for sure - or what will happen tonight. But we can't wait to find out!

Check out the photos and previews we've posted for a primer on the episode. Tell us, what are you most excited for - and hoping happens - on Grey's Anatomy?

As always, you can discuss "What a Difference a Day Makes" before, during and after the show airs in our momentous day for our favorite show ...

Will this beautiful bride get married tonight?

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.