The “One Chicago” universe is losing one of its major players.

It was recently announced that Jesse Spencer, the actor who playsCapt.

Matthew Caseyon “Chicago Fire,” is leaving the show after ten seasons (viaUSA Today).

Jesse Spencer and Kara Killmer smiling

And 18 years is a long time, that’s a long stretch."

It’s safe to say fans of the show are saddened by Spencer’s departure.

However, according to Spencer, there might be no need to fear, Brettsey fans!

Jesse Spencer and Kara Killmer talking

Casey shared with Brett that he had to leave for Oregon.

“I have to move to Oregon,” Casey tells Brett in the episode.

Placed into separate foster homes.

They’re both struggling so much already feeling alone that it could destroy them" (viaDeadline).

Fans quickly began to fear for Casey and Brett’s relationship.

According toTV Insider, Spencer said, “We’ve established a really, really nice relationship.

I loved working with [Kara].

We got on so well,” Spencer continued.

“And there is the chance that I will come back …

They’re trying to make this relationship work.”

“We’re going to see some after-effects with Brett.