Neil Flynn

Flynn was born on Chicago's South Side to Irish Catholic parents and grew up as one of six children before his family relocated to Waukegan, Illinois. At Waukegan East High School, he won an Illinois state championship in Humorous Duet Acting alongside partner Mike Shklair in 1978. He earned a degree in speech from Bradley University in Peoria, Illinois, in 1982, where he competed on the university's nationally ranked speech team and performed at the Hartmann Center for Performing Arts.

After college, Flynn remained in Chicago and pursued dramatic acting, working with the Goodman Theatre and Steppenwolf Theatre Company. He won a Joseph Jefferson Award Citation in 1986 for his role in The Ballad of the Sad Cafe at Absolute Theatre Company. A spontaneous visit to ImprovOlympic (now iO Theater) changed his creative direction, and he became a regular performer at both iO and The Second City, training under Del Close and collaborating with emerging talents including Amy Poehler and Tina Fey. He received a Joseph Jefferson Award nomination in 1996 for Farewell My CompuServe at The Second City.

Flynn co-founded the improv ensemble Beer Shark Mice with Pat Finn and David Koechner, developing the ensemble chemistry and spontaneous character work that would become his professional signature.

His film debut came with Major League (1989), and he appeared in several films throughout the 1990s before his television breakthrough. He auditioned for the role of Dr. Cox on Scrubs but was cast as the Janitor, initially appearing only in the pilot episode. His improvisational ability so impressed the producers that the role expanded into a series regular across all nine seasons (2001 to 2010) and over 180 episodes. Many of the Janitor's most memorable moments were improvised on set.

From 2009 to 2018, Flynn starred as Mike Heck on ABC's The Middle across all 215 episodes, earning a Critics' Choice Television Award nomination for Best Supporting Actor in a Comedy Series in 2016. Notable film roles include Chip Heron in Mean Girls (2004) and FBI Agent Smith in Indiana Jones and the Kingdom of the Crystal Skull (2008). His recent work includes the role of Raymond on Apple TV+'s Shrinking (2023 to present). Flynn's work since The Middle has included guest appearances in various television productions and continuing stage work, maintaining his performing presence in both improvisational and scripted contexts. His long-form improv background at iO gave him a facility with character behavior and ensemble timing that has distinguished his screen work from actors who arrived at television through more conventional acting training paths. His public identification with the Chicago improv tradition, in interviews and public appearances, has contributed to the broader awareness of iO's role in producing performers who sustain long network television careers.