D.J. Steinberg, now in his fifth decade as a major entertainer and comedian, was a regular substitute host for Johnny Carson, and appeared with Johnny more than anyone except Bob Hope. As a standup, he had four number one comedy albums and two network television shows, and was a leader of Second City during its heyday. He went on to help write and direct such television megahits as Curb Your Enthusiasm, Seinfeld, Mad About You, Friends, and Designing Women. He is also executive producer, creator, and host of Sit Down Comedy with David Steinberg. Over the last forty years, he has worked with nearly all of entertainment's funniest performers and comedians.