Chicago Fire is known for its high-stakes drama and compelling storylines, but part of the show’s charm comes from its impressive roster of guest stars. From legendary rock icons to Chicago’s real-life mayor, these special appearances have brought extra excitement and depth to the series. With Chicago Fire being a staple in Dick Wolf’s “One Chicago” franchise, it’s no surprise that actors from all walks of life have dropped by Firehouse 51 to add their unique flair.
Here are some of the most memorable guest stars who made a lasting impact on Chicago Fire.
1. Chicago Mayor Rahm Emanuel
Episodes: Season 1, Episode 1 (“Pilot”) & Season 7, Episode 22 (“I’m Not Leaving You”)
In a nod to the real-life setting of the series, former Chicago Mayor Rahm Emanuel made a special appearance in the pilot episode of Chicago Fire. Serving as the city’s mayor from 2011 to 2019, Emanuel brought a touch of authenticity to the show by playing himself. He even made another cameo in Season 7, showcasing his support for the Windy City’s firefighters. Emanuel also appeared in Chicago Med, making him a familiar face across the “One Chicago” universe.
2. Brett Dalton
Episodes: Seasons 10 & 11
Best known for his role as Grant Ward on Marvel’s Agents of S.H.I.E.L.D., Brett Dalton joined Chicago Fire as Interim Lt. Jason Pelham. His character stepped in following the departure of Lt. Matthew Casey (Jesse Spencer). Pelham quickly earned the respect of Firehouse 51, despite the bittersweet circumstances of his arrival. Fans of Dalton also know him from the video game Until Dawn and his recent role in NBC’s Found. His arc on Chicago Fire concluded when Stella Kidd was promoted, leading Pelham to transfer to a different firehouse.
3. Carl Edwards (NASCAR Legend)
Episode: Season 4, Episode 6 (“2112”)
Carl Edwards, the celebrated NASCAR driver, made a surprise guest appearance in Season 4 as a delivery man. Edwards, who raced from 2004 to 2016, is known for his numerous accolades on the track. Though his role on Chicago Fire was a quick cameo, it delighted fans, especially those familiar with his racing career. His brief but memorable appearance was a fun nod for NASCAR enthusiasts tuning in.
4. Joe Keery
Episodes: Season 3, Episodes 16 (“Red Rag the Bull”) & 17 (“Forgive You Anything”)
Before he became a breakout star on Stranger Things, Joe Keery made one of his earliest TV appearances on Chicago Fire. He played Emmett Bird, the half-brother of Mouch’s (Christian Stolte) biological daughter from a past sperm donation. Keery’s scenes showcased his natural talent, especially in a heartfelt interaction where his character confronted Mouch about taking responsibility. Beyond his role on Chicago Fire, Keery is the lead singer of the Chicago-based band Post Animal, further cementing his connection to the city.
5. Rock Legends Rush: Alex Lifeson & Geddy Lee
Episode: Season 4, Episode 6 (“2112”)
Fans of classic rock were in for a treat when two members of the iconic band Rush made a cameo in Season 4. Guitarist Alex Lifeson and lead singer Geddy Lee appeared backstage after Firehouse 51 was invited to their concert as a thank-you for a heroic rescue. The episode title, “2112,” is a nod to one of Rush’s most famous albums. Mouch, a die-hard fan of the band, was visibly starstruck, adding a humorous and heartwarming moment to the show.
6. Carl Weathers
Episode: Season 5, Episode 3 (“Scorched Earth”)
Carl Weathers, known for his iconic roles in the Rocky series and Predator, made a powerful appearance in Season 5 as Illinois State Attorney Mark Jefferies. Weathers brought his signature intensity to the role, helping Firehouse 51 navigate a legal dilemma. His appearance also set the stage for Dick Wolf’s legal drama spin-off, Chicago Justice, where Weathers reprised his role as a formidable political figure.
