Big Brother Season 27 premieres July 10 with 17 houseguests entering Hotel Mystère. Get cast details, house tour, and shocking mystery player reveal.

Fans and Big Brother houseguests alike were amazed by Rachel Reilly's dramatic appearance on the first episode of Season 27.

Big Brother season 27 debuted on July 10, 2025, with 16 players checking into the Hotel Mystère to compete against each other for a $750,000 cash prize and the winner's title.

The houseguests of ‘Big Brother’s 27th season were unveiled shortly before the premiere! Get to know each of them and their motivation in joining the game.

Big Brother has returned to the screens with season 27. While the fans finally got to meet the houseguests, a new mystery has been dropped on the audience. Read the details below.

In the first episode, host Julie Chen Moonves entered the house, but a sudden blackout occurred. When the lights came back on, she was missing, and only her shoe was left behind, hinting that she had been taken.

"Big Brother" is back this summer with Season 27, where the official theme will be "Big Brother: A Summer of Mystery."