Jack McBrayer began his training at Chicago's ImprovOlympic and at The Second City. He performed with his IO house team, Georgia Pacific, as well as traveling the country with The Second City National Touring Company. On the Second City e.t.c. stage, Jack helped create and perform in three revues. After moving to New York, Jack played with the UCB team Optimist International, as well as sitting in as a guest performer in Asssscat. He also performed in various other shows at UCB in addition to being a sketch performer on Late Night with Conan O'Brien. Jack currently plays the role of Kenneth on NBC's 30 Rock.