Big Brother is a television reality game show based on an originally Dutch TV series of the same name created by producer John de Mol in 1997. The show follows a group of HouseGuests living together 24 hours a day in the "Big Brother" house, isolated from the outside world but under constant surveillance with no privacy for three months. Since its television debut in 2000, Big Brother has run continuously with at least one season of the show airing each year. It is currently the second longest running version in the world to have done so, after the Spanish version. The HouseGuests compete for the chance to win a $500,000 grand prize by avoiding weekly eviction, until the last HouseGuest remains at the end of the season that can claim the $500,000 grand prize. The American series is hosted by television personality Julie Chen. Produced by Allison Grodner and Rich Meehan for Fly On The Wall Entertainment, it currently airs in the United States on CBS and Global.