‘Chicago Fire’ Spinoff Adds Sophia Bush, Patrick Flueger as Series Regulars

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The actors join Jason Beghe, Jon Seda and Jesse Lee Soffer on "Chicago PD"

"Chicago PD" is rounding off its cast with two new series regulars, a network representative told TheWrap.

"One Tree Hill" star Sophia Bush and "The 4400's" Patrick Flueger are joining the team.  

Bush will play Erin Lindsay, a team member with an unexpected past. Flueger will play Kyle Ruzek, a rookie recruited by Voight (Jason Beghe) from the Academy for dangerous and specialized investigation work.

Also read: 'The Killing,' 'True Blood' Star Michelle Forbes Lands Role on 'Chicago Fire'

The new additions join already announced stars Beghe, Jon Seda and Jesse Lee Soffer.

The spinoff follows the department's Intelligence Unit, the team that combats the city's major offenses – organized crime, drug trafficking, high profile murders and beyond.

A Universal Television and Wolf Films production, Dick Wolf, Matt Olmstead, Michael Brandt, Derek Haas, Peter Jankowski, Danielle Gelber and director Joe Chappelle serve as executive producers.