As of 2015, "Chicago Fire" has 10 main cast members. Jesse Spencer, Taylor KInney, Charlie Barnett, and Monica Raymund play major roles. Other cast members include Eamonn Walker, David Eigenberg, Joe Minoso, and Yuri Sardarov. Christian Stolte and Kara Kilmer round out the cast.
"Chicago Fire" follows the lives of paramedics, fire fighters, and the Rescue Squad of Chicago Firehouse 51. Australian actor Jesse Spencer stars as Lieutenant Matthew Casey. Casey is considered the show's protagonist. Taylor Kinney co-stars as fellow lieutenant Kelly Severide, the brash leader of the Rescue Squad.
Charlie Barnett plays Peter Mills, a recent graduate who comes from a family of fire fighters. Monica Raymond plays Gabriela Dawson, a paramedic who decides to train as a fire fighter. Both actors are graduates of the Julliard School in New York City.
British Actor Eamonn Walker also stars as Battalion Chief Wallace Boden, while David Eigenberg plays Christopher Herrmann. Both characters represent seasoned, experienced firemen. Joe Minoso also plays a fireman. Yuri Sardarov plays Firehouse 51's elevator rescue specialist.
Randy "Mouch" McHolland, played by Christian Stolte, is a veteran fire fighter who works to protect the younger generation. Kara Kilmer, playing young paramedic Sylvie Brett, joined the main cast in the show's third season.