The big day is almost here! Will (Nick Gehlfuss) and Natalie (Torrey DeVitto) are poised to tie the knot in Chicago Med's exhilarating fall finale, set to air Wednesday, Dec. 7 at 8/7c on NBC, but one looming problem could spoil their wedding day festivities. After all, Will has kept his fiance in the dark about his involvement with the FBI's investigation into the mobster Ray and that secret just might be the very thing that tears them apart.

"The first choice that he made about treating Ray so he could get the reception hall was a very bad choice. And now that continues to haunt him and there [will be] repercussions," showrunner Diane Frolov told TV Guide.

Here's hoping that the ceremony goes off without a hitch because if anyone deserves to bask in pure wedded bliss, it's them. As we gear up for what promises to be a memorable day, it'll definitely be a family affair. According to co-showrunner Andrew Schneider, Will's big bro Jay (Jesse Lee Soffer) will take on the best man duties and Maggie (Marlyne Barrett) will serve as Natalie's Maid of Honor. Plus, Natalie's son Owen will step up as the ring bearer.

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Ethan (Brian Tee) is also expected to attend the big ceremony but he won't be going with April (Yaya DaCosta). Despite both still harboring feelings for each other after breaking up, Ethan will take his ex-girlfriend Vicky (Cynthia Addai-Robinson) as his date instead. But he has a pretty good reason for it!

"Ethan doesn't know that she's changed her mind. He has feelings for her but she was so strong and antagonistic so there's a lot of misunderstanding in that relationship," Frolov explained.

The chances of the pair making up anytime soon are slim, especially since things are going so well with Vicky. Schnieder confirmed to TV Guide that she'll be sticking around "for a while." But while Ethan might be all about Vicky right now, that doesn't mean you should give up hope for him and April to rekindle things.

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"They both have such strong feelings for one another so there's always the possibility that things could change," said Schneider. Added Frolov, "They just gotta get past all this stubbornness and anger."

They'll also need to overcome several workplace obstacles including the tricky dynamic of dating a superior (Ethan's a doctor and April's a nurse) and not allowing personal feelings to influence professional decisions. Should be a piece of cake, right?

Watch the drama unfold when Chicago Med's fall finale airs Wednesday, Dec. 5 at 8/7c on NBC.

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Nick Gehlfuss and Torrey DeVitto, Chicago Med

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Other Links From TVGuide.com Chicago MedTorrey DeVittoNick Gehlfuss