Big Brother 2008, also known as Big Brother 9, was the ninth series of the British reality television series Big Brother. The show followed twenty-one contestants, known as housemates, who were isolated from the outside world for an extended period of time in a custom built House. Each week, one or more of the housemates were eliminated from the competition, and left the House. The last remaining housemate, Rachel Rice, was declared the winner, winning a cash prize of £100,000.