Kara Killmer Set to Make Major Acting Return Nearly Two Years After emotional ‘Chicago Fire’ Departure

Fans of the NBC procedural drama Chicago Fire have a major reason to celebrate. Nearly two years after her poignant exit from Firehouse 51, Kara Killmer—known globally as paramedic Sylvie Brett—is officially returning to the screen. The actress has secured a pivotal role in the upcoming biographical drama Jimmy, signaling a new chapter in her career that trades the high-stakes sirens of Chicago for the sweeping history of Hollywood’s Golden Age.

Killmer first won the hearts of millions when she joined Chicago Fire in Season 3, stepping into the daunting role of replacing a fan-favorite character. Over the next decade, she became a cornerstone of the “One Chicago” franchise, portraying Sylvie Brett with a blend of vulnerability, optimism, and unwavering professional grit. Her journey on the show culminated in Season 12, when her character finally found her “happily ever after,” marrying longtime love Matt Casey (Jesse Spencer) and moving to Portland to start a new life. While the exit provided fans with much-needed closure, it left a significant void in the series and left many wondering when they would see Killmer again.

The wait is now over. In her first major project since leaving the firehouse, Killmer will star in Jimmy, a high-profile biographical film centered on the life of legendary American actor and military officer James Stewart. The film stars KJ Apa (of Riverdale fame) as the iconic Stewart. Killmer takes on the role of Lady Julia, a character described as a talented singer who performs for troops during wartime.

Early glimpses of the film, including the first trailer, suggest a romantic and emotionally resonant arc for Killmer. Her character is seen captivating servicemen from the stage before sharing intimate, cinematic moments with Stewart near military aircraft. The role allows Killmer to showcase a different side of her talent, blending performance art with a period-piece aesthetic that is a far cry from her days in a paramedic uniform.

For Killmer, Jimmy represents a significant pivot from television to feature films. While Chicago Fire required a fast-paced, episodic grind, this biographical drama offers a chance to explore a historical narrative with a grander scale. The film is currently slated for a theatrical release on November 6, 2026.

Industry insiders and fans alike are keeping a close eye on this “comeback.” While the “One Chicago” world is famous for its “revolving door” policy—where actors often return for guest appearances—Killmer’s move into a major motion picture suggests she is focused on diversifying her portfolio. However, the door to Firehouse 51 is never truly closed; with Matt Casey having made several returns to the show, fans remain hopeful that Sylvie Brett might one day visit her old colleagues for a special event.

As the release of Jimmy approaches, the excitement surrounding Killmer’s return serves as a testament to the enduring bond she built with her audience over ten years. Whether she is saving lives on the streets of Chicago or serenading soldiers on the big screen, Kara Killmer remains a captivating presence in the world of entertainment.