The Upright Citizens Brigade is an improvisational comedy and sketch comedy group that emerged from Chicago's ImprovOlympic in 1990. The most recent incarnation consists of Matt Besser, Amy Poehler, Ian Roberts, and Matt Walsh. The original incarnation of the group consisted of Besser, Ali Farahnakian, Drew Franklin, Adam McKay, Roberts, Rick Roman, and Horatio Sanz. Other early members included Neil Flynn, Armando Diaz, and Rich Fulcher.

Amy Poehler, Matt Walsh, Matt Besser, Ian Roberts