irehouse 51 has benefitted from dozens of talented recruits throughout the many seasons of Chicago Fire, but paramedic Sylvie Brett, played by Kara Killmer, took the definition of dedicated to a new level.
Whether she was helping a civilian while on a nail-biting call or snuggling up to Matthew Casey (Jesse Spencer), any moment of Sylvie’s screen time was a blast throughout Killmer’s 10 years on the series. Effortlessly beautiful and infinitely charming, Brett is one of the most caring first responders to grace the Windy City. Her passion for helping fellow firefighters and empathy for those in need led Brett to become a One Chicago M.V.P., and Chi-Hards couldn’t get enough of her all the way up to her tear-jerking One Chicago farewell.
Relive Sylvie Brett’s emotional Chicago Fire tenure in the wake of her wedding.
Sylvie Brett and Matthew Casey got married in Season 12
In the Season 12 premiere (“Barely Gone”), Brett had good news and bad news for Chi-Hards and 51. The good news: She and Casey were engaged. The bad news: After their Windy City wedding, Brett was leaving 51 to move to Portland with Casey.
Brett delivered the news after Randall “Mouch” McHolland (Christian Stolte) asked for details about the wedding. With several kids between them, Brett and Casey decided to ditch their long-distance relationship, blend their families, and settle in Portland, Oregon.
“Matt and I talked it through and the truth is we’ve waited long enough to be together full-time,” Brett revealed.
In the end, Casey and Brett’s wedding was as unique as their relationship. There was some confusion over the wedding venue, but Firehouse 51 came together to make it a beautiful ceremony, and the couple’s vows were achingly vulnerable.
With their first kiss as husband and wife, Brett and Casey officially became a family.
Read on to look back on Sylvie Brett’s Chicago Fire journey to see the impact the passionate paramedic made.
How did Sylvie Brett and Matt Casey end up together on Chicago Fire?
From Seasons 3 to Season 6 their relationship was primarily platonic as Casey was in a relationship with Brett’s then-partner Gabby Dawson (Monica Raymund) and Brett was dating other people. After Casey and Dawson broke up, Casey and Brett grew closer due to their mutual heartbreaks.
In Season 7 of Chicago Fire, Casey and Brett’s relationship rew increasingly flirtatious — though that was when then-Fire Chaplain Kyle Sheffield (Teddy Sears) made his move and Sylvie briefly left Chicago to be with him.
After she returned in Season 8 of Chicago Fire, the idea of a “Brettsey” romance became more of a possibility, particular after Casey became Brett’s shoulder to cry on after the death of her mother.
RELATED: Look Back at Matthew Casey and Sylvie Brett’s Relationship Over the Years
In Season 9, Episode 2 (“That Kind of Heat”), the tension between Brett and Casey reached a boiling point after they shared an intimate kiss after a stressful call. Despite Chi-Hards thinking this was the moment they’d been waiting for, Brett asked Casey to leave after realizing he still had feelings for Dawson.
She then briefly dated CFD Lieutenant Greg Grainger, before he realized her past with Casey prevented their relationship from flourishing.
In Season 9, Episode 15 (“A White-Knuckle Panic”), Casey revealed he was in love with Brett and no longer had any feelings for Dawson; she admitted she loved him, too, in Season 9, Episode 16 (“No Survivors”). By Season 10, the pair was happily dating, and everything was coming up roses.
Sadly for Brettsey fans everywhere, the relationship experienced major turbulence after Casey left both Firehouse 51 and Chicago after becoming the legal guardian of his late friend’s two sons who were living in Portland. The pair initially agreed to take a stab at a long-distance relationship, but the separation proved devastating to their momentum as a couple.
RELATED: Sylvie Brett’s Departure During Chicago Fire Season 10, Explained
In the Season 11 premiere of Chicago Fire, Brett broke up with Casey over the phone. After the break-up, she explored a relationship with a minor league hockey player named Dylan before he broke up with her in the Season 11 finale.
It was then that Casey returned with a marriage proposal for Brett — but fans had to wait for Season 12 to learn she said yes.
When did Sylvie Brett first appear on Chicago Fire?
Brett made her way to Firehouse 51 in the Season 3 premiere of Chicago Fire (“Always”).
She moved to Chicago from Indiana after being placed at 51 as the replacement for Leslie Shay (Lauren German) following Shay’s death in the Season 2 finale. Due to the tragic circumstances of Brett’s placement, she didn’t receive the warmest of welcomes: She was paired up with fellow paramedic Dawson, who initially struggled to acclimate to her new partner.
RELATED: Kara Killmer Shares Behind-The-Scenes Pic from Chicago Fire Season 12
Brett was forthright about having no intentions of replacing Shay as a person; she just wanted to make a new home for herself. Sylvie soon became one of Dawson’s best friends and forged several steel-tight bonds throughout the CFD, making her paramount to their success.
Brett’s move to the Windy City came after she’d left Indiana because she’d supposedly gotten cold feet before her wedding to her one-time fiancé. In Season 3, Episode 4 (“Apologies Are Dangerous”), it was shockingly revealed that she hadn’t experienced cold feet — he had. Sylvie’s ex surprised her and her colleagues with a visit to the firehouse to get her back, but Sylvie pointed him to the door after being reminded of his cold-hearted and controlling nature.
