John Heffron is an American stand-up comedian, actor, and writer. He was born on July 19, 1970, in Detroit, Michigan, United States. Heffron began his career in comedy in the 1990s, performing at clubs and festivals around the United States. He gained national attention after winning the second season of the NBC reality competition show "Last Comic Standing" in 2004. Since then, Heffron has continued to tour and perform stand-up comedy, releasing several comedy albums and specials. He has also appeared on a number of television shows, including "Chelsea Lately," "The Tonight Show with Jay Leno," and "The Late Late Show with Craig Ferguson."In addition to his work in comedy, Heffron has also acted in several films and television shows, including "Holey Moley," "Dinner for Schmucks," and "Curb Your Enthusiasm."