Stephen Rannazzisi is an American actor and stand-up comedian best known for his role as the lovably competitive and perpetually scheming Kevin MacArthur on the long-running FXX comedy series The League. His portrayal of a suburban dad whose fantasy football league consumes his life became a defining character in the ensemble show, earning him recognition and a dedicated fanbase. Born on July 4, 1977, in Smithtown, Long Island, New York, Rannazzisi developed an interest in comedy and performance from a young age, eventually moving to Los Angeles to pursue a career in entertainment.

His early career was built on the stand-up comedy circuit, where he honed his timing and relatable, everyman persona. This foundation led to his first television appearances, including guest spots on popular series such as The Sopranos, Judging Amy, and CSI: Crime Scene Investigation. He also landed roles in films like Superbad and I Love You, Man, often playing supporting characters that showcased his comedic chops. These roles paved the way for his major breakthrough when he was cast in The League in 2009.

Starring alongside Mark Duplass, Nick Kroll, Paul Scheer, Katie Aselton, and Jon Lajoie, Rannazzisi's Kevin became a central figure in the show's seven-season run. The series, which blended scripted comedy with improvisation, thrived on the chemistry of its cast, and Rannazzisi's performance was integral to its success. During and after the show's conclusion in 2015, he continued to work in television with roles on The McCarthys and Workaholics, and he provided voice work for animated projects. He also maintained his stand-up career, performing at clubs and theaters across the country.

In his personal life, Stephen Rannazzisi married Tracy Romano on September 2, 2006, and the couple has two children. Beyond acting, he has explored other creative avenues, including writing and podcasting. He remains a recognizable face in comedy, celebrated for his contribution to a cult-favorite television series and his steady presence in the stand-up world. His career exemplifies the trajectory of a working comedian who found a perfect role, leaving a lasting impression through his work on The League.