Chicago Fire veteran actor Anthony Ferraris began as an extra, not a performer
Anthony Ferraris, a real retired Chicago firefighter, joined Chicago Fire as an extra in Season 1 and became a main cast member despite having no acting experience. He has appeared in over 250 episodes across 15 seasons, making him the seventh-most credited performer on the show. Ferraris praised the series for accurately depicting the intense camaraderie and downtime dynamics of real firehouse life.