The One Chicago universe has dominated network television for more than a decade, delivering intense rescues, gripping police investigations, and unforgettable characters

who became household names. But as the franchise evolves in 2026, many of the actors who helped build the success of Chicago Fire and Chicago P.D. have moved on to surprising new chapters

in their careers and personal lives. For longtime fans, catching up with these stars reveals just how dramatically their journeys have changed since they first stepped onto the streets of Chicago.

Jesse Spencer (Matt Casey)
Perhaps the most iconic firefighter in Chicago Fire history, Jesse Spencer left the series as a regular in 2021 after portraying Captain Matt Casey for ten seasons. His departure marked a major shift for Firehouse 51. Since then, Spencer has stepped back from the relentless pace of network television, choosing to focus more on family and selective creative projects.

The Australian actor’s most recent work included a limited streaming drama that showcased a quieter, more dramatic side of his acting talent. While Spencer has kept a lower profile in recent years, fans still speculate about a potential return to the One Chicago universe—especially as Firehouse 51 continues to face leadership challenges that once defined Casey’s role.

Kara Killmer (Sylvie Brett)
Kara Killmer, who played beloved paramedic Sylvie Brett, also said goodbye to the franchise after more than a decade. Her character’s emotional farewell storyline concluded with Brett marrying Casey and starting a new life outside Chicago.

Since leaving the show, Killmer has expanded her work into film and independent television projects, often taking on roles that highlight complex emotional storytelling. Despite stepping away from the paramedic uniform, she remains deeply connected to the Chicago Fire fanbase and occasionally reunites with former co-stars at industry events.

Taylor Kinney (Kelly Severide)
While many original cast members have moved on, Taylor Kinney continues to anchor Chicago Fire as Lieutenant Kelly Severide. Over the years, Severide’s leadership has become one of the defining elements of the show’s later seasons.

Kinney has also begun branching into producing and developing television projects behind the scenes. Insiders say he has taken on a more influential role in shaping the series’ direction as it moves deeper into its long run.

For fans, Severide remains one of the last remaining links to the show’s earliest days.

Jason Beghe (Hank Voight)
Over on Chicago P.D., Jason Beghe’s portrayal of Sergeant Hank Voight remains one of the most complex characters in the franchise. Known for his morally gray approach to policing, Voight has carried the emotional weight of the series for more than a decade.

Behind the scenes, Beghe has increasingly stepped into mentorship roles with younger cast members while continuing to deliver some of the show’s most intense performances. His character’s future remains a constant subject of speculation, as Chicago P.D. continues to push the boundaries of its storytelling.

Sophia Bush (Erin Lindsay)
One of the most surprising career evolutions belongs to Sophia Bush, who left Chicago P.D. years ago after playing Detective Erin Lindsay. Since then, Bush has become heavily involved in activism, producing projects, and hosting podcasts that explore social and political issues.

Her transition from network drama star to influential media voice has impressed many fans who watched her early days in the One Chicago universe.

Monica Raymund (Gabriela Dawson)
Monica Raymund’s character, firefighter-paramedic Gabriela Dawson, was once at the emotional center of Chicago Fire. After leaving the series, Raymund transitioned successfully into directing television episodes across multiple networks.

Her work behind the camera has earned critical praise, proving that her talents extend far beyond acting.

The Legacy Continues

As 2026 unfolds, the One Chicago universe remains a powerful force in television. While some familiar faces have stepped away from the spotlight of the franchise, their contributions continue to shape the DNA of both shows.

New characters have arrived, storylines have evolved, and the firehouses and precincts of Chicago look a little different than they once did.

But for fans who spent years watching these actors bring firefighters and detectives to life, one thing remains certain: the legacy of Chicago Fire and Chicago P.D. is built on the unforgettable performances of the stars who made the franchise what it is today.

And even years later, many of them are still surprising us.