The New Faces Of Firehouse 51: Everything You Need To Know About The 'Chicago Fire' Cast For Season 13

The landscape of Firehouse 51 is always changing, and the latest season of Chicago Fire has brought some of the most significant shake-ups in the show's history, making the current cast a dynamic mix of seasoned veterans and fresh talent. As the series enters its latest run, viewers are witnessing major departures and exciting new additions, fundamentally altering the command structure and the paramedic team.

This comprehensive guide, updated for late 2024 and early 2025, provides a deep dive into the actors who bring the drama, heroism, and heart to the One Chicago universe. From the return of beloved mainstays like Lieutenant Kelly Severide to the introduction of a new Battalion Chief, here is the definitive breakdown of the Chicago Fire cast for the upcoming seasons, complete with detailed biographies and their most notable works outside of NBC's hit drama.

Firehouse 51's Elite: A Complete Cast & Character Biography List (Season 13)

The main cast of Chicago Fire is a core ensemble that has been the backbone of the series for over a decade. This list details the actors, their characters, and their professional backgrounds, including the newest faces stepping into major roles for the current and upcoming seasons.

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• Taylor Kinney as Lieutenant Kelly Severide (Squad 3 Lieutenant)

  Biography: Taylor Jackson Kinney (born July 15, 1981) is an American actor and model, best known for his long-running role as Kelly Severide. Before joining Chicago Fire in 2012, Kinney gained recognition for his recurring role as Mason Lockwood on The Vampire Diaries. His film credits include the critically acclaimed war drama Zero Dark Thirty and the comedy The Other Woman. Kinney's return to the series after a temporary absence has been a major storyline, keeping the 'Severide' and 'Stellaride' fan bases engaged.

• Miranda Rae Mayo as Lieutenant Stella Kidd (Truck 81 Lieutenant)

  Biography: Miranda Rae Mayo (born August 14, 1990) is an American actress from Fresno, California. She joined Chicago Fire in Season 4, quickly becoming a fan favorite and a pivotal character. Prior to her role as the ambitious and dedicated Lieutenant Stella Kidd, Mayo starred as Lacey Briggs on the ABC series Blood & Oil and had recurring roles on shows like Pretty Little Liars and Days of Our Lives.

• David Eigenberg as Lieutenant Christopher Herrmann (Truck 81 Lieutenant)

  Biography: David Eigenberg (born May 17, 1964) is an American actor with a prolific career across television and film. While he is a beloved fixture at Firehouse 51 as the veteran firefighter and bar owner, he is perhaps most famous for his role as Steve Brady on the iconic HBO series Sex and the City and its sequel series, And Just Like That.... His long-running commitment to both massive franchises demonstrates his versatility and enduring appeal.

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• Christian Stolte as Randall "Mouch" McHolland (Truck 81 Firefighter)

  Biography: Christian Stolte (born October 16, 1962) is an American character actor known for his reliable, everyman performances. He has been a fixture in the One Chicago universe since the beginning, playing the quirky, television-obsessed 'Mouch.' Outside of TV, Stolte has appeared in several major films, including Law Abiding Citizen and the Joe Pesci drama The Public Eye.

• Joe Minoso as Joe Cruz (Squad 3 Firefighter)

  Biography: Joe Miñoso (born September 25, 1978) is an American actor and filmmaker. He is a core member of the Firehouse 51 family, known for his portrayal of the resourceful and family-focused Joe Cruz, who also invented the "Slamigan" tool. Before his long tenure on Chicago Fire, Minoso was known for roles in the Starz series Boss and had appearances in shows like Prison Break.

• Dermot Mulroney as Battalion Chief Dom Pascal (New Main Cast)

  Biography: Dermot Patrick Mulroney (born October 31, 1963) is a highly recognizable American film and television actor who joined the cast in a major new role for Season 13, replacing the departing Chief Wallace Boden. Mulroney is known for his roles across a wide variety of genres, including romantic comedies like My Best Friend's Wedding, dramas such as August: Osage County, and the recent horror franchise Scream VI. His casting signals a major shift in the command structure of Firehouse 51.

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• Jocelyn Hudon as Lyla Novak (Paramedic)

  Biography: Jocelyn Hudon (born November 18, 1994) is a Canadian actress who was promoted to a series regular for Season 13 after a recurring role in the previous season. She plays the new paramedic, Lyla Novak, filling a crucial gap in the Ambulance 61 team following the departure of Kara Killmer's Sylvie Brett. Hudon is a former ballerina who trained at the National Ballet School of Canada and is known for roles in Hallmark movies and the series The Strain.

The Impact of Major Departures: Filling the Void at Firehouse 51

The longevity of a show like Chicago Fire inevitably means saying goodbye to beloved characters, and the transition into Season 13 has been particularly impactful. The departure of two major figures—one from the command staff and one from the paramedic team—has necessitated the recent significant casting changes.

The most notable exit was that of Chief Wallace Boden, played by veteran actor Eamonn Walker. Boden was the moral compass and commanding presence of Firehouse 51 for over twelve seasons. His departure leaves a massive hole in the show's dynamic, which the introduction of Dermot Mulroney as Battalion Chief Dom Pascal is intended to fill.

Similarly, the departure of Paramedic Sylvie Brett, played by Kara Killmer, created an immediate vacancy on Ambulance 61. Brett's exit, which saw her character marry Matt Casey (Jesse Spencer) and move to Portland, was a sentimental moment for fans. This vacancy is being addressed by the promotion of Jocelyn Hudon's Lyla Novak to a series regular, a move that signals a fresh start for the paramedic storyline and a new dynamic for the Ambulance 61 team.

These casting decisions are not just about replacing actors; they are about injecting new energy and conflict into the long-running series, ensuring that the stories remain fresh and the stakes feel real for the audience.

Looking Ahead: New Talent and Character Dynamics in the One Chicago Universe

The production team behind Chicago Fire is constantly planning for the future, and this includes introducing new characters to keep the Firehouse 51 environment vibrant and evolving. The latest announcement points to a significant addition for the subsequent season, showcasing the series' commitment to long-term topical authority and fresh storylines.

A major piece of casting news for the future is the addition of Brandon Larracuente as Sal Vasquez, a new series regular slated to join the cast in Season 14. Larracuente is a rising star known for his roles in popular streaming and network shows.

• Brandon Larracuente as Sal Vasquez (New Series Regular - Season 14)

  Biography: Brandon A. Larracuente (born November 16, 1994) is an American actor who will be joining Firehouse 51 as Sal Vasquez. He is well-known to streaming audiences for his roles as Ben Rayburn in the Netflix series Bloodline and as Jeff Atkins in the hit drama 13 Reasons Why. His previous work also includes a starring role in the Freeform drama Party of Five and a recurring role in The Good Doctor. His casting is one of the biggest announcements for the series' upcoming run, promising a new layer of drama and camaraderie to the team.

The introduction of Sal Vasquez in Season 14, following the promotion of Lyla Novak in Season 13, demonstrates a clear strategy to evolve the ensemble. These new characters will interact with the core veterans—including Kelly Severide, Stella Kidd, and Christopher Herrmann—creating new mentor-mentee relationships and potential conflicts that will drive the narrative forward. The dynamic between the established Squad 3 and Truck 81 teams and these new faces is where the freshest storytelling lies.

The Enduring Legacy of the One Chicago Crossover Entities

A key element of Chicago Fire's success and its topical authority is its place within the interconnected "One Chicago" universe, which includes Chicago P.D. and Chicago Med. The cast members frequently cross over, blurring the lines between the shows and creating a massive, shared world for the characters.

Actors like Taylor Kinney and David Eigenberg have made numerous guest appearances on the sister shows, cementing the idea that Firehouse 51, the 21st District, and Gaffney Chicago Medical Center are all part of the same professional community. This interconnectedness allows for complex, long-form storytelling that keeps the audience invested in the entire franchise, not just one series. The continued presence of veteran actors ensures that these crossover events remain authentic and impactful. The introduction of new characters like Lyla Novak and Sal Vasquez also opens up new possibilities for interactions with characters from the other shows, such as those from the Intelligence Unit or the Emergency Department staff, further expanding the vast entity map of the One Chicago world.