Big Brother 25 is the twenty-fifth season of the American reality television program Big Brother. The season premiered on August 2, 2023, on CBS in the United States, and on Global in Canada, following a 25th Anniversary special aired on July 26. Hosted by Julie Chen Moonves, the show follows a group of contestants (known as HouseGuests), who live in a house together while being constantly filmed and having no communication with the outside world as they compete to win a grand prize of $750,000.