Celebrity Big Brother, also known as Big Brother: Celebrity Edition, is a reality television spin-off series of the American adaptation of Big Brother created by John de Mol. The series began on February 7, 2018 on CBS in the United States and is simulcast in Canada on Global. The series is filmed at CBS Studio Center in sound stage eighteen located in Studio City, Los Angeles. Julie Chen Moonves reprises her role as host from Big Brother with Allison Grodner and Rich Meehan also returning as executive producers. The series is produced by Fly on the Wall Entertainment in association with Endemol Shine North America.

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.