Big Brother 2 is the second season of the American reality television series Big Brother. It is based upon the Netherlands series of the same name, which gained notoriety in 1999 and 2000. The series premiered on CBS on July 5, 2001. The HouseGuests entered the house on June 30 with the series lasting 82 days. The season concluded on September 20, 2001, with Dr. Will Kirby being crowned the winner, and Nicole Nilson Schaffrich the runner-up.

Big Brother is an American television reality competition show based on the Dutch reality show of the same name created by producer John de Mol Jr. in 1997. The series takes its name from the character in George Orwell's 1949 novel Nineteen Eighty-Four. The American series launched on July 5, 2000 on CBS, and since the discontinuation of the Spanish version in 2022, is the longest-running adaptation in the Big Brother franchise.