Matthew Daddario Suits Up For 'Chicago Fire' Season 15

Firehouse 51 is getting ready to open its doors to another fresh face. Actor Matthew Daddario is officially heading to the hit NBC procedural *Chicago Fire* for its upcoming fifteenth season, taking on the role of a new firefighter candidate on the squad. The casting confirmation follows a subtle social media reveal straight from the set. On Thursday, August 20, fellow incoming cast member Da’Vinchi shared a set picture that offered fans an early glimpse at Daddario joining the production. Da’Vinchi, who recently signed on as a full-time series regular playing a character of the exact same candidate rank, posted the image accompanied by three fire emojis to mark the occasion.

Who Is Matthew Daddario Playing In Chicago Fire Season 15?

Specific story details regarding Daddario’s character are still being kept secret by the show's team, but his role as a firefighter candidate means he will be jumping straight into the line of duty. Rookie candidates on *Chicago Fire* routinely face rigorous challenges, intense training moments, and heavy scrutiny from the veteran crew members running the station. Bringing in fresh candidates gives the procedural a chance to shake up the internal hierarchy and test the patience of the senior firefighters. Daddario’s arrival alongside Da’Vinchi creates a compelling setup for Season 15, as both new recruits navigate the grueling physical and emotional demands of serving the windy city.

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What Has Matthew Daddario Acted In Before Chicago Fire?

Daddario already brings a massive, dedicated television following with him to the Dick Wolf franchise. The actor previously built a huge fan base playing fan-favorite Alec Lightwood on the hit supernatural drama *Shadowhunters*. Following that breakout role, he went on to star in the critically acclaimed anthology series *Why Women Kill*, proving his range across fantasy and dark comedy. Now, Daddario is trading demon hunting and marital intrigue for heavy gear, fire hoses, and life-or-death rescue calls. With cameras currently rolling on set and new photos trickling out from the cast, excitement is rapidly building to see how the new batch of recruits handles the heat when *Chicago Fire* Season 15 debuts.