Earned a degree in finance from Georgetown University and worked as a litigation consultant in Florida before switching careers.
Performed first stand-up routine in 1991, and then spent four years scripting commercials and studying acting.
First appearance on David Letterman's show garnered Gaffigan acclaim and an offer to develop the sitcom Welcome to New York, which was canceled after three months.
Has appeared in more than 200 commercials, including campaigns for Saturn, ESPNews, Energizer, Barnes & Noble.com, Kodak and Rolling Rock. His commanding presence in commercials earned him the title "Salesman of the Year" by Business Week in 1999.
Appeared in two movies chosen for the 2001 Sundance Film Festival: Super Troopers and Thirty Years to Life.
Featured in a Late Night with Conan O'Brien animated series called Pale Force.
Made his Broadway debut in 2011 in That Championship Season, opposite Brian Cox, Chris Noth, Jason Patric and Kiefer Sutherland.
Jeannie Gaffigan — Wife
Joe Gaffigan — Brother
Mitch Gaffigan — Brother
Marre Gaffigan — Daughter
Jack Gaffigan — Son
Katie Louise Gaffigan — Daughter
Jeanne Noth — Wife
Michael Gaffigan — Son
Georgetown University, Washington, District of Columbia, United States (MS in Business, 1988)