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

In Season 27 of "Big Brother," houseguests will spend the summer inside Hotel Mystère, an enigmatic yet luxurious version of the "Big Brother" house.

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

"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 is back in the Big Brother house, and fans are either cheering or ready to change the channel. The Season 13 champ made a surprise entrance on the July 10 premiere of Big Brother 27 as the long-rumored “mystery houseguest,” after CBS teased her return with a week of cryptic clues.

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 off and running in season 27 on CBS, with double-digit percent growth in total viewers from the year-ago season opener.

Big Brother stars are about to race around the world as CBS reveals the next season of The Amazing Race will feature former houseguests. The season 38 cast has yet to be officially announced, but long-time host Phil Keoghan sat down with BB host Julie Chen Moonves to talk about the big crossover.