Rachel Reilly, winner of Big Brother 13, was unveiled as the "mystery houseguest" competing again this summer on season 27.CBS had been teasing a secret player all week and dropping clues on social media as to who it was.

Popular reality show "Big Brother" premiered this week, featuring two Texas residents who say they are up for the challenge.

Big Brother season 27 is taking place with a brand new house theme called Hotel Mystere, and it will have mystery challenges for the houseguests left and right.

Big Brother follows a group of people living together in a house outfitted with more than 100 cameras and 100 microphones, recording their every move 24 hours a day. Each week, someone will be voted out of the house, with the last remaining Houseguest receiving the grand prize of $750,000.

“Big Brother” fans, the wait is finally almost over. With summer underway, Season 27 is coming up quickly, and it’s one you don’t want to miss. Look forward to meeting a new group of Houseguests who are bringing a perfect combination of A-game and ...

Sleeper car bunk room: Behind a secret entrance, this train-themed bedroom straight out of a murder mystery novel contains bunkbeds for six Houseguests (the first time the BB house has had bunk beds since season one!) and a sleek Art Deco design.

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