The Ultimate Guide To The Chicago Fire Cast: Who’s In, Who’s Out, And The Shocking Season 13 Changes

The landscape of Firehouse 51 has dramatically shifted. As of late 2024, the premiere of Season 13 of Chicago Fire has brought a wave of new faces and emotional farewells, making it one of the most turbulent cast updates in the history of the long-running Dick Wolf procedural drama. Fans are reeling from the departure of two beloved veterans—Chief Wallace Boden and Paramedic Sylvie Brett—forcing the remaining crew to adapt to a new leadership structure and a significant hole in Ambulance 61's roster.

This comprehensive guide details the current main cast, provides a full biography for each actor, and breaks down the crucial exits that have set the stage for a dramatic new era in the One Chicago franchise. You need to know who is running Truck 81 and Squad 3 as the CFD faces its toughest challenges yet.

The Firehouse 51 Roll Call: Complete Main Cast Biographies (Season 13)

The heart of Chicago Fire remains the dedicated crew of Firehouse 51. Here is the full list of series regulars for Season 13, along with their character roles and essential career highlights, demonstrating the deep bench of talent that drives the show.

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• Taylor Kinney as Lieutenant Kelly Severide (Squad 3)
  • Born: July 15, 1981, Lancaster, Pennsylvania.
  • Career Highlights: Kinney initially studied business management before transitioning to acting. He gained significant recognition for his role as Mason Lockwood on the hit supernatural drama The Vampire Diaries. On the big screen, he appeared in the critically acclaimed film Zero Dark Thirty (2012) and the comedy The Other Woman (2014). His decade-plus run as the charismatic Lieutenant Severide has made him the undisputed anchor of the series.
• Miranda Rae Mayo as Lieutenant Stella Kidd (Truck 81)
  • Born: August 14, 1990, Fresno, California.
  • Career Highlights: Before joining Chicago Fire in Season 4, Mayo established herself with roles on the soap opera Days of Our Lives and the short-lived prime-time soap opera Blood & Oil. Her character, Stella Kidd, evolved from a recurring firefighter to a main cast member and a Lieutenant, representing one of the show’s most significant character arcs. She is half of the fan-favorite couple, "Stellaride," with Kelly Severide.
• Hanako Greensmith as Paramedic Violet Mikami (Ambulance 61)
  • Born: November 11, 1996.
  • Career Highlights: Greensmith is a multi-talented artist, also a singer, cellist, and writer. Before landing the role of Paramedic Violet Mikami, she had guest appearances on other Dick Wolf productions, including FBI and Bull. Her character's promotion to Paramedic in Charge highlights her crucial status, especially following the recent departure of her partner, Sylvie Brett.
• David Eigenberg as Captain Christopher Herrmann (Truck 81)
  • Born: May 17, 1964.
  • Career Highlights: Eigenberg is a veteran actor with a distinguished career, most famously known for his role as Steve Brady, Miranda Hobbes' husband, on HBO's Sex and the City and its sequel series, And Just Like That.... A former United States Marine Corps member, his portrayal of the passionate, family-man Captain Herrmann grounds the firehouse with a mix of humor and heart.
• Joe Miñoso as Firefighter Joe Cruz (Squad 3)
  • Born: September 25, 1978.
  • Career Highlights: A Chicago-born theater and television actor, Miñoso has been with the show since the beginning. His character, Joe Cruz, is known for his invention of the 'Slamigan' and his deep bond with his fellow firefighters. Miñoso also appeared in the Starz series Boss before his long tenure on Chicago Fire.
• Christian Stolte as Firefighter Randy "Mouch" McHolland (Truck 81)
  • Born: October 16, 1962.
  • Career Highlights: Stolte is a Missouri-born actor who has become an iconic figure in the One Chicago universe. He is known for his work in films like Law Abiding Citizen (2009). As 'Mouch'—a portmanteau of "Man" and "Couch"—he provides comic relief and unexpected moments of heroism as one of the longest-serving members of the Truck Company 81 crew.
• Jake Lockett as Firefighter Sam Carver (Truck 81)
  • Born: March 12, 1985.
  • Career Highlights: Lockett joined the series in Season 11 and quickly became a main cast member. A former classmate of Stella Kidd, his character, Sam Carver, brings a complex, often abrasive dynamic to the team. Interestingly, Lockett holds a Bachelor of Science degree in Aerospace Engineering from Texas A&M.

The Shocking Exits and The New Chief of Firehouse 51

The transition from Season 12 to Season 13 was marked by several high-profile departures that fundamentally changed the leadership and dynamics of the show. Understanding these exits is crucial for following the new narrative.

The End of an Era: Chief Boden's Departure

One of the most significant cast changes in the show's history was the departure of Eamonn Walker as Chief Wallace Boden. Walker, who played the beloved and stoic leader of Firehouse 51 since the series premiere, exited as a series regular at the end of Season 12. The character's exit was handled with respect, seeing him promoted to Deputy Commissioner, a move that allows the door to remain open for potential guest appearances in the future. Chief Boden's influence and presence had been the guiding force for over a decade, and his absence leaves a massive void in the command structure.

A Farewell to 'Brettsey': Kara Killmer's Emotional Exit

The other major emotional blow to fans was the departure of Kara Killmer, who played Paramedic Sylvie Brett for nine seasons, starting in Season 3. Her storyline concluded with a beautiful wedding to her long-time love interest, Jesse Spencer's character, Matthew Casey, who returned as a guest star for the event. The couple, affectionately known as "Brettsey," moved to Oregon to start their life together. Killmer has expressed excitement about pursuing new projects after her long tenure in the One Chicago universe.

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New Leadership: Dermot Mulroney as Chief Dom Pascal

To fill the massive leadership gap left by Boden's promotion, the show introduced a new character in Season 13: Battalion Chief Dom Pascal, played by veteran actor Dermot Mulroney. Mulroney, known for his roles in rom-coms like My Best Friend's Wedding and dramas like August: Osage County, steps into the series-regular role. Chief Pascal's arrival signals a fresh, likely challenging, dynamic for the crew of Firehouse 51, who must now adjust to a new command style that is almost certainly different from Boden's paternal approach.

The Future of Firehouse 51: Season 13 and Beyond

The cast changes in Season 13 are not merely procedural; they are a deliberate effort by the showrunners to inject new energy and dramatic tension into the long-running series. The exit of characters like Alberto Rosende's Blake Gallo and Rome Flynn's Derrick Gibson in Season 12 already signaled a commitment to streamlining the cast and focusing on the core relationships.

With Lieutenant Severide and Lieutenant Kidd (Stellaride) now the most senior members of the house, their leadership roles—both in their respective companies (Squad 3 and Truck Company 81) and as a couple—will be tested under the new Chief Dom Pascal. The future of Ambulance 61, now led by Violet Mikami, will also be a major focal point, as she must find a new permanent partner to continue the crucial work of the Chicago Fire Department's Paramedic Division.

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As the show continues its run as a cornerstone of NBC's primetime lineup, the current cast is poised to navigate a new chapter, proving that even after over 250 episodes, the bonds of Firehouse 51 are strong enough to withstand even the most impactful changes.