Sylvie Brett (Kara Killmer) is a central cog in the Chicago Fire machine. She not only leads the medic team, she brings a warm and understated presence to the 51 as a whole. She struggled with the Casey (Jesse Spencer) breakup in season 11, but the finale shifted things radically by having Casey return and propose to her.
Brett has been part of the show for multiple seasons now, and some fans are curious about her age. The character is entering a new stage of her life, between the proposal and the decision to become an adoptive mother (a nice full-circle nod to the fact that she was adopted as a child).
Here’s what we know about Brett’s age in relation to the rest of the Fire cast.
How old is Kara Killmer on Chicago Fire?
Brett is actually one of the few characters who are given a specific age at a specific time. In the episode 8 episode “Off the Grid” she states that she’s 30 years old, which means that she was born in 1990. Brett’s estranged mother Julie (Kelly Deadmon) eventually dies in the same episode, and she’s confirmed to have been sixteen years older.
As of 2023, Brett is 33 years old. This makes her roughly a decade younger than Casey, who is said to be around 44 years old. This also makes the character slightly younger than Kara Killmer, who is 34.
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A lot of the times, showrunners and writers will try to match the age of the characters to the actors who play them out of convenience.
It makes it easier to match up continuity, and it means the actors don’t have to stretch in terms of having to play much younger or older. In the case of Brett, the focus of the season 8 episode was important to nail down, so giving her a specific age makes sense. The fact that it’s close to the age of the actor playing her helps immeasurably.
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