Big Brother 2009, also known as Big Brother 10, was the tenth series of the British reality television series Big Brother. The show followed a total of twenty-two contestants, 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 evicted by a public vote. The last remaining housemate, Sophie Reade, was declared the winner, winning a cash prize of £71,320.