In 1970, Hefner stated that "militant feminists" are "unalterably opposed to the romantic boy-girl society that Playboy promotes" and ordered an article in his magazine against them. In the 1993 The Simpsons episode "Krusty Gets Kancelled", Hefner voiced himself. In 1999, Hefner financed the Clara Bow documentary Discovering the It Girl. "Nobody has what Clara had," he said. "She defined an era and made her mark on the nation". Hefner guest-starred as himself in the 2000 Sex and the City episode "Sex and Another City". In 2005, he guest-starred on the HBO shows Curb Your Enthusiasm and Entourage. He guest-starred as himself in a 2006 episode of Seth Green's Robot Chicken on the late-night programming block Adult Swim. In the 2007 Family Guy episode "Airport '07", he voiced himself. He has a star on the Hollywood Walk of Fame for television and made several movie appearances as himself. In 2009, he received a "worst supporting actor" nomination for a Razzie award for his performance as himself in Miss March. On his official Twitter account, he joked about this nomination: "Maybe I didn't understand the character. "