"So there's going to be a strong reaction in both directions for this mystery Houseguest."Ahead of season 27, here are the 12 best Big Brother seasons to watch, all of which are available to stream on Paramount+.

Rachel Reilly opens up about returning to Big Brother 27, balancing motherhood, and her plans to compete for the $750,000 prize.

Grab a life vest, floaters, because look who just resurfaced back in the Big Brother house.

Big Brother 27,' hosted by Julie Chen Moonves, premieres on Thursday,. See which houseguests are in power as HoH, who is nominated and who has been evicted so far

Chris Hughes spoke about his romantic relationship with 'Big Brother' costar JoJo Siwa, calling it 'serendipity' and revealing plans for the future

"Big Brother" Season 27 contestants better grab a life vest, because star Rachel Reilly is checking in as the 17th houseguest

Rachel Reilly and Brendon Villegas met on 'Big Brother 12' and built a lasting marriage after winning fans with their showmance

As Big Brother marks a quarter-century milestone. Its legacy is characterized by iconic incidents that influenced reality television and popular discourse.

Here's everything to know about the rules all Big Brother contestants must follow. One of the most crucial elements in Big Brother is eliminating the noise from the outside world so contestants can fully focus on the show. Houseguests do not have access to the internet or any other form of outside communication.

"Big Brother" is back with the season 27 premiere Thursday. Here is everything to know about the episode and the new season.