<P> The son of CFD Captain Benny Severide ( Treat Williams ) , Kelly was raised singlehandedly by his mother , Jennifer Sheridan ( Kim Delaney ) , after Benny left the family when Kelly was in elementary school . Although Kelly has since reconnected with his father , they still share a love - hate relationship . He is often known to the `` white shirts '' ( high - ranking officers ) as Benny 's son but never used his father 's name to advance his career , instead carving out his own reputation as a highly competent firefighter . </P>
<P> The son of CFD Captain Benny Severide ( Treat Williams ) , Kelly was raised singlehandedly by his mother , Jennifer Sheridan ( Kim Delaney ) , after Benny left the family when Kelly was in elementary school . Although Kelly has since reconnected with his father , they still share a love - hate relationship . He is often known to the `` white shirts '' ( high - ranking officers ) as Benny 's son but never used his father 's name to advance his career , instead carving out his own reputation as a highly competent firefighter . </P>
who plays severide 's parents on chicago fire
who plays severide 's parents on chicago fire
Benny Severide ( Treat Williams ) Jennifer Sheridan ( Kim Delaney )
Benny Severide ( Treat Williams ) Jennifer Sheridan ( Kim Delaney )