The Girls Next Door, also known as The Girls of the Playboy Mansion, is an American reality television series broadcast on the E! cable television network. The series was created by executive producer Kevin Burns and Hugh Hefner, founder and editor-in-chief of Playboy magazine. The show was followed by two spin-offs, Kendra and Holly's World. The series focuses on the lives of Hefner's girlfriends who live with him at the Playboy Mansion. Hefner is often on the show along with various Playmates and other celebrities. The series not only showcases events at the Playboy Mansion (e.g. Fight Night, Fourth of July celebration, the midsummer celebration etc.), but also sheds light on other Playboy related events such as the Playboy Jazz Festival at the Hollywood Bowl, Playmate test shoots at Playboy Studio West, Operation Playmate, party night, birthday parties, and more significantly, the personalities and real lives of each of the Girls.