Jim Gaffigan is a Grammy-nominated stand-up comedian, writer and actor who began his career in comedy in the early 1990s. In his new book, "Dad is Fat," Gaffigan explores his role as a father of five and in one chapter concludes "there is no difference between a four year old eating a taco and throwing a taco on the floor." After moving from the Midwest to pursue acting and comedy in New York, he landed a spot on "The Late Show with David Letterman" in 1993, and his clever, quiet style has earned him an unprecedented number of appearances on "Letterman," "Conan," and "Late Night with Jimmy Fallon." Since then, he's been in several television shows and films, plus three one-hour stand-up specials: "Beyond the Pale" (2006), "King Baby" (2009) and most recently "Mr. Universe" (2012).