Gregory Behrendt is an American stand-up comedian and author. His work as a script consultant to the HBO sitcom Sex and the City paved the way for co-authoring the New York Times bestseller He's Just Not That Into You (2004), which was later adapted into a film by the same name. In addition to his writing success, he also hosted two short-lived talk shows, The Greg Behrendt Show (2006) and Greg Behrendt's Wake Up Call (2009).