Gregory Behrendt (born July 21, 1963) is an American comedian and author. His work as a script consultant to the HBO sitcom Sex and the City, starring Sarah Jessica Parker, paved the way for co-authoring of the New York Times bestseller He's Just Not That into You (2004), later adapted into a film by the same name. Apart from that he also hosted two short-lived television shows, The Greg Behrendt Show (2006) and Greg Behrendt's Wake Up Call (2009).