Housemates are voted out (usually on a weekly basis) until only one remains and wins the cash prize.
During their stay in the house, contestants are continuously monitored by live television cameras as well as personal audio microphones.
, there have been 387 seasons of Big Brother in over 54 franchise countries and regions.
English-language editions of the program are often referred to as "BB".
The housemates with the most nominations are then announced, and viewers are given the opportunity to vote via telephone for the nominee they wish to be evicted. Some more recent editions have since included additional methods of voting, such as voting through social media and smartphone applications.
In the first season of Big Brother, the house was very basic.
Although essential amenities such as running water, furniture and a limited ration of food were provided, luxury items were often forbidden.
The format has become an international TV franchise.