7 Shocking Cast Changes: Your Complete Guide To The Chicago Fire Cast 2024-2025

The landscape of Firehouse 51 has been dramatically reshaped. As of late 2024, the *Chicago Fire* cast has seen some of the most significant shake-ups in the show's history, with beloved veterans saying goodbye and new, dynamic faces stepping up to fill the void. This article provides the most up-to-date and complete profile of the main cast for the current and upcoming seasons, highlighting the major exits and the promising new additions that are defining the next era of the One Chicago flagship series.

The 2024 television year—encompassing the conclusion of Season 12 and the start of Season 13—has been a period of intense transition for the crew of Truck 81, Squad 3, and Ambulance 61. With the departures of key players like Sylvie Brett and Blake Gallo, the remaining members, led by the steadfast Lieutenant Kelly Severide, are forging a new path, making this the most crucial time to get to know the current faces of Firehouse 51. The latest photos and promotional materials confirm a blend of seasoned veterans and fresh talent ready to tackle the heat.

The Firehouse 51 Main Cast: Full Biography and Profile List (2024-2025)

Here is the definitive list of the current series regulars for *Chicago Fire*, including their character roles and a brief biography of the actors.

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• Taylor Kinney as Lieutenant Kelly Severide (Squad 3)
  • Born: July 15, 1981, in Lancaster, Pennsylvania, U.S.
  • Bio: Kinney is an American actor and model, best known for his long-running role as Kelly Severide. He also appeared in the film *Zero Dark Thirty* and on TV in *The Vampire Diaries*. His character's dramatic return in 2024 following a brief hiatus was a major storyline for the show.
• Miranda Rae Mayo as Lieutenant Stella Kidd (Truck 81)
  • Born: August 14, 1990, in Fresno, California, U.S.
  • Bio: Mayo joined the cast in Season 4 and quickly became a fan favorite, eventually marrying Severide. She is also known for her role as Lacey Briggs on the soap opera *Blood & Oil*. Beyond acting, Mayo is a singer and emphasizes mindfulness in her personal life.
• David Eigenberg as Lieutenant Christopher Herrmann (Engine 51)
  • Born: May 17, 1964, in New York, U.S.
  • Bio: A veteran actor, Eigenberg is instantly recognizable to many as Steve Brady from *Sex and the City* and its spin-off, *And Just Like That...*. He has been a core member of *Chicago Fire* since the pilot, portraying the lovable, family-man lieutenant. He is married to Chrysti Eigenberg, a former Army specialist.
• Joe Miñoso as Firefighter Joe Cruz (Squad 3)
  • Born: September 25, 1978, in The Bronx, New York, U.S.
  • Bio: Miñoso is an American actor and filmmaker who has been with the show since Season 1. His character, Joe Cruz, is known for his invention (the 'Slamigan') and his compelling family storylines, including his work as a father and husband. He is also a respected theater actor.
• Christian Stolte as Firefighter Randall "Mouch" McHolland (Truck 81)
  • Born: October 16, 1961, in St. Louis, Missouri, U.S.
  • Bio: Stolte is an American actor whose character, "Mouch" (a portmanteau of Man + Couch), provides much of the comic relief. Before *Chicago Fire*, he was known for playing corrections officer Keith Stolte on *Prison Break*. He has been a series regular since Season 2.
• Hanako Greensmith as Paramedic in Charge Violet Mikami (Ambulance 61)
  • Born: November 11, 1996, in New York City, U.S.
  • Bio: Greensmith joined the show as a recurring character in Season 8 and was promoted to a series regular, eventually becoming the Paramedic in Charge (PIC) of Ambulance 61. She is also a singer, cellist, and writer. Her character's storyline has become central following Kara Killmer's exit.
• Jocelyn Hudon as Paramedic Lyla Novak (Ambulance 61)
  • Born: November 18, 1994, in Toronto, Canada.
  • Bio: Hudon is a Canadian actress and dancer who joined *Chicago Fire* in Season 12 as a recurring character, Paramedic Lyla Novak (sometimes referred to as Lizzie Novak). She was quickly promoted to a series regular for the upcoming season, cementing her as the new partner for Violet Mikami on Ambulance 61.
• Michael Bradway as Firefighter Jack Damon (Truck 81)
  • Bio: Bradway is a newcomer to the television world, joining the cast in Season 12 as a recurring character, Firefighter Jack Damon. He quickly became a pivotal figure on Truck 81. His character's mysterious past and connection to the fire department are set to be a major focus of the next season.

The Shocking Exits and New Faces That Define the 2024 Season

The biggest story of the 2024 season has been the cast shake-up, which has dramatically altered the dynamic of Firehouse 51. The show said goodbye to three long-time main cast members, paving the way for new blood and new conflicts.

Kara Killmer’s Emotional Farewell as Sylvie Brett

The most impactful departure of the 2024 television year was Kara Killmer, who played Paramedic Sylvie Brett. Brett had been the Paramedic in Charge of Ambulance 61 since Season 3. Her final episode saw her marry Matt Casey (Jesse Spencer) and move to Portland, Oregon, marking a heartfelt ending to one of the show's longest-running romances.

The void left by Brett’s exit was immediately addressed by the promotion of Hanako Greensmith’s character, Violet Mikami, to Paramedic in Charge, and the introduction of new paramedic Lyla Novak, played by Jocelyn Hudon. This transition ensures that Ambulance 61 remains a central focus, but with a completely new partnership dynamic. The pictures of the new Ambulance 61 duo are a clear sign of the show's commitment to moving forward with fresh storylines.

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Eamonn Walker’s Departure and Chief Boden’s New Role

Another monumental change was the departure of Eamonn Walker, who played Battalion Chief Wallace Boden. Chief Boden was the moral compass and father figure of Firehouse 51 since the very first episode. His exit was handled with a significant promotion: Boden became the Deputy Commissioner of the CFD, a move that honors his character's legacy while allowing the actor to step back from the demands of a series regular role.

While Walker is no longer a main cast member, the door remains open for guest appearances. He is slated to return for at least one episode in the upcoming season, giving fans a glimpse of Chief Boden’s life in his new, high-ranking position. His absence at Firehouse 51 means the remaining lieutenants, Herrmann and Severide, must step up to manage the crew's daily operations and morale.

The Exit of Blake Gallo and the New Blood on Truck 81

The start of Season 12 also saw the departure of Alberto Rosende, who played the ambitious and skilled Firefighter Blake Gallo. Gallo’s exit in the season premiere was a surprise to many fans. His decision to leave Firehouse 51 to help train new recruits marked another significant void on Truck 81.

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To fill this gap, the show introduced Michael Bradway as Firefighter Jack Damon, a mysterious and intense new character who quickly makes his mark on the crew. Damon’s arrival, along with the promotion of Jocelyn Hudon, signifies the show’s push to introduce compelling, younger characters who can carry the series into its next chapter. The new cast pictures featuring Bradway and Hudon alongside the veterans highlight this shift in the ensemble's makeup.

The Future of Firehouse 51: Severide, Kidd, and the One Chicago Universe

Despite the major cast turnover, the core of Firehouse 51 remains strong, centered around the enduring partnership of Lieutenant Kelly Severide and Lieutenant Stella Kidd, affectionately known as "Stellaride."

The return of Taylor Kinney after a personal leave has reassured fans that the show’s leading man is back for the long haul. His character's return has refocused the narrative on his relationship with Stella and his role as a leader on Squad 3. The latest cast photos often feature Kinney and Miranda Rae Mayo prominently, symbolizing their central importance to the show's future.

Furthermore, the *Chicago Fire* cast continues to be a vital part of the larger One Chicago universe, with regular crossovers and tie-ins with *Chicago P.D.* and *Chicago Med*. This interconnectedness ensures that even with cast changes, the series maintains a rich tapestry of characters and storylines that fans have come to expect.

The 2024-2025 season promises to be one of the most transformative in *Chicago Fire* history. With a new Deputy Commissioner, a new Ambulance 61 pairing, and a mysterious new firefighter on Truck 81, Firehouse 51 is entering an exciting new era. Fans should prepare for a season filled with fresh drama, intense rescues, and the continued evolution of their favorite characters.