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This BTS Video of Kara Killmer and Jesse Spencer Will Make You Laugh Out Loud

They had a blast reuniting for the Stellaride wedding.

By McKenzie Jean-Philippe
Kara Killmer As Sylvie Brett and Jesse Spencer As Casey dancing together

There may be trouble in paradise on-screen for these two, but behind the scenes, Chicago Fire's Brett (Kara Killmer) and Casey (Jesse Spencer) are smooth-sailing. 

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Watch Chicago Fire Wednesdays at 9/8c on NBC and next day on Peacock.

In a candid behind-the-scenes moment while filming the Season 10 finale—a.k.a. the epic Stellaride wedding—Killmer took to her Instagram to share a hilarious video of herself and Spencer. In the clip, the actors are showing off some extremely unique dance moves in-between takes.

"The best ever," was the actress' simple caption.

Killmer also shared some more BTS photos from the finale on Instagram: 

The Chicago Fire Season 10 finale episode, titled "The Magnificent City of Chicago," marked both actors' highly-anticipated return to the series. Spencer's guest appearance came after he exited the drama following the 200th episode in October 2021. Killmer went on a brief hiatus after Season 10, Episode 15.

The finale revealed that Brett and Casey's relationship is on shaky ground. While Brett went to visit Casey in Portland earlier in the season, long distance may just be too big an obstacle for the couple to overcome.

"You made a beautiful life for yourself in Oregon, Matt. But it's your life, not mine. My 51 family is here. My work is here, my life is here. How much longer can we keep this up with so much time apart?" Brett told her boyfriend during a dance at the Stellaride wedding reception.

His response? "I don't know, but we're together tonight." 

We'll just have to wait for Season 11 to see what happens to this couple.

Chicago Fire will return to NBC on Wednesday nights in fall 2022. Watch Season 10 now on NBC.com.