Chicago Fire's Kara Killmer Previews Brettsey's Wedding 'Miracle' And What She Didn't Warn Jesse Spencer About

Brett and Casey at their wedding in Chicago Fire Season 12x06
(Image credit: Adrian S Burrows Sr/NBC)

Chicago Fire is on the verge of losing another series regular in the 2024 TV schedule with the Season 12 departure of Kara Killmer as Sylvie Brett, and the show is sending her off with fanfare with the Brettsey wedding. Jesse Spencer returns as a guest star for Brett and Casey to tie the knot, but it remains to be seen how smoothly they'll be able to try and ride off into the sunset after how the previous episode ended. The actress spoke with CinemaBlend about her final episode and why a miracle was needed with Jesse Spencer's return!

Kara Killmer's penultimate episode (available streaming via Peacock Premium subscription) ended on an unfortunate discovery for Brett: the wedding venue she'd booked via Tony wasn't the Shedd Aquarium as she'd thought, but rather a local establishment that more closely resembled a pet store than an aquarium. With no time to spare, the nuptials will have to happen in a very fishy atmosphere in the February 28 episode, called "Port In the Storm."

When I spoke with the actress about the upcoming episode, she noted that "Tony has got to stick to saving lives on Squad" on his day job rather than "planning weddings for people." Brett is paying the price for waiting until late to make plans, I'd say! Kara Killmer shared that she actually had a personal connection to the venue, saying:

What's funny is I actually know the owner because I'm friends with a couple who owns a bar called The Lost Reef and it's a cocktail bar that has a ton of aquariums in it, of exotic fish. Tank It Easy, which is the aquarium we use in the show, is the supplier of those fish. So I actually knew the owner.

What makes for a fun night out in Chicago doesn't appear to make for a good wedding venue, based on Brett's reaction when she first saw the spot where she's expected to say her vows to Casey! As it turns out, the character's reaction to the pet store/aquarium rang true for the actress. Kara Killmer told CinemaBlend:

I had the same response that Sylvie did when I saw it for the first time. I was like, 'Okay, we have our work cut out for us. This is going to be a miracle.' But you know, it's kind of a staple of our show to have one house member have a big problem and then everyone else in 51 has to kind of put their heads together and brainstorm and come up with a solution that ends up being more than you could ever imagine.

If any crew in One Chicago could transform a pet store into a wedding venue with time running out, I'd say that the Firehouse 51 family has the best odds of a miracle! Besides, Chicago Fire has a history of unconventional weddings, ranging from Boden and Donna in the early years to Stella and Severide relocating their wedding to a boat to Dawson and Casey in his first wedding when they tied the knot at a courthouse. Sometimes, it really does take a miracle on Fire.

Killmer went on to share what she considered warning co-star Jesse Spencer about as their characters married:

It's definitely one of those kinds of situations, and you can kind of tell from the promo, but they really transform the space. And I thought about tipping Jesse off. I thought about kind of giving him the heads up to be like, 'Hey, we're getting married in a fish store!' And I just thought, 'What's the point? He's Australian, he's gonna walk in there and feel right at home.' And he did! He loved it.

Jesse Spencer has only appeared in a few episodes since departing Chicago Fire as a series regular back in the first half of Season 10, but Matt Casey has remained part of the plot... simply off-screen aside from some guest appearances, the last of which involved the Brettsey cliffhanger proposal. Apparently, the pet store venue for the wedding didn't bother Spencer in the slightest.

Of course, even with all of the unconventional Chicago Fire weddings, Brett and Casey's venue might rank as the most bizarre. When I asked Kara Killmer how these nuptials compare to others fans have seen on the show, she shared:

This is definitely unique. If you had told me 'Oh, Brett and Casey get married in a historical church or an old firehouse or a country club somewhere' or something, I would have been like, 'Of course, that sounds about right!' But a fish store, I never would have guessed. So this is a completely unique space, and I wouldn't be surprised if the owner is gonna have to prepare for people to start requesting [to] have their wedding there because people are going to use it as a venue from now on.

With as successful as One Chicago has been for more than a decade now, who's to say that there aren't couples who would be happy to tie the knot in the same place as Brett and Casey? There at least may be more availability than the Shedd Aquarium!

In all seriousness, Brett and Casey are in need of a miracle for their wedding, and fans don't have too much longer to wait to see just how successful their friends are (or are not) in pulling it off. For now, take a look at the promo:

Tune in to NBC on Wednesday, February 28 at 9 p.m. ET for Kara Killmer's final episode of Chicago Fire with the Brett/Casey wedding and return of Jesse Spencer. The heavy lifting of transforming the venue may fall on maid of honor Violet's shoulders, but it seems safe to say that she'll have plenty of help. As always, Fire airs in the middle of NBC's One Chicago block of primetime, between Chicago Med at 8 p.m. ET and Chicago P.D. at 10 p.m. ET.

Laura Hurley
Senior Content Producer

Laura turned a lifelong love of television into a valid reason to write and think about TV on a daily basis. She's not a doctor, lawyer, or detective, but watches a lot of them in primetime. CinemaBlend's resident expert and interviewer for One Chicago, the galaxy far, far away, and a variety of other primetime television. Will not time travel and can cite multiple TV shows to explain why. She does, however, want to believe that she can sneak references to The X-Files into daily conversation (and author bios).