Here's every Chicago Fire character who will be in the Brettsey wedding
Unsurprisingly, there's going to be lots of 51 representation.
Best Man: Kelly Severide
That's right, he's coming back! Kelly Severide (Taylor Kinney) has been a tough man to get ahold of in season 12, but the promo for "Port in the Storm" confirms that he will be back to support his best pal Casey on the most important day of his life.
Casey returned to Chicago to serve as Severide's best man, so it's only fitting that the favor be returned. Plus, this may be the last time we get to see these two hang out and reflect on the lives that they've built for each other. We're looking forward to it.