Jesse Spencer

The Season 6 premiere of Chicago Fire both delivered the heat and sent Casey and Severide flying. Literally. 

From drinks at Molly's to hectic mayday calls, the friendships forged on Chicago Fire are the soul of the show.

Kinney and Spencer first stole our hearts as firefighters Severide and Casey, Chicago Fire's most iconic buddy duo.

While many One Chicago sweethearts are thriving, these ill-fated relationships have plagued Chi-Hards.

The former Chicago Fire star stunned with some workout-inspired moves!

Chicago Fire fans remember the proposal scene between Brett (Kara Killmer) and Casey (Jesse Spencer) well. But do they remember the ring? 

When the Chicago Fire alum first emerged on the Hollywood scene, he was sporting much longer hair than Matthew Casey. 

NBC Insider spoke with co-executive producer Demetra Diamantopoulos to get the scoop on filming locations.

Find out when new episodes of Chicago Fire return. 

Excuse me? The Chicago Fire actor is from where?!

Revisit the makings of the fan-favorite fire captain played by Chicago Fire's Jesse Spencer.

This is how they make that Brettsey magic happen on Chicago Fire.

The always-optimistic and empathetic Brett left Chicago Fire in 2024— but it's for a pretty great reason. 

The Firehouse 51 friends sure knew how to get into trouble during their time in the Windy City.

Firehouse 51's sweetheart tied the knot and launched a new chapter in her life outside Chicago.

Grab the tissues and revisit some of "Brettsey's" cutest moments as a couple on Chicago Fire. 

After 5 seasons of One Chicago bliss, the paramedic and the firefighter are finally husband and wife.

Casey and Severide's latest cigar chat gave Chi-Hards some serious déjà vu. 

"It is just so satisfying to get to see them finally make that commitment to each other," Killmer told NBC Insider.

Love is in the air in Illinois!