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Cast & how to watch premiere on CBS

When does 'Big Brother' Season 27 premiere? Date, cast, how to watch

Season 27 of the hit reality competition series premieres this week with the official theme " Big Brother: A Summer of Mystery ," CBS confirmed earlier.

· 10h

‘Big Brother’ season 27 premiere - How to watch for free tonight

· 16h · on MSN

'Big Brother' Season 27: How to watch new episodes, schedule and more

· 9h

Rachel Reilly Checks Into ‘Big Brother’ Season 27 in 17th Mystery Houseguest Twist

“Houseguests will enter the enigmatic Hotel Mystère, a place where secrets lurk behind every door and nothing is as it seems,” CBS previously teased.

· 1d

The ‘Big Brother 27’ cast list is here — meet the eclectic mix of houseguests

· 1d

Big Brother’s Julie Chen Moonves Talks Retirement ‘Game of Chicken’ With Jeff Probst and Phil Keoghan

9hon MSN

‘Big Brother’ Reveals Rachel Reilly as Season 27’s Mystery Houseguest

Before the season 27 premiere, many fans speculated that the mystery houseguest could be anyone from Celebrity Big Brother UK star JoJo Siwa to a Big Brother newcomer like Tom Sandoval from Vanderpump Rules. Viewers even hypothesized that this season, the host herself, Julie Chen Moonves, would join the cast as a contestant.

2don MSN

‘Big Brother’ Season 27 Cast Photos: All The Houseguests Confirmed For CBS Competition

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.

2don MSN

‘Big Brother 27’ Cast Includes a Dungeon Master, Aura Painter and More: Meet the Houseguests

The cast of "Big Brother" Season 27 has been revealed — with one "Mystery Player" set to make a surprise entrance.