Big Brother is an American version of the Big Brother reality television show based on the Dutch television series of the same name originally created in 1997 by John de Mol's company Endemol. The show is based on a group of strangers, known as HouseGuests, living together twenty-four hours a day in the "Big Brother" house, isolated from the outside world but under constant surveillance with no privacy for three months. In thirteen seasons of the show, 151 different people have entered the Big Brother house so far. It is currently the longest running version of the Big Brother format, running slightly longer than the British format which premiered a few weeks after the launch of the American version. It has remained the longest running version of the format since 2004 during its fifth season, thereby surpassing the Dutch version which was cancelled during its fourth season in 2002. It has currently been renewed until at least the end of its 13th season in 2011 in which it will have completed 12 consecutive years on air.