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

Rachel Reilly, winner of Big Brother 13, was unveiled as the "mystery houseguest" competing again this summer on season ...

In announcing the “Summer of Mystery” theme, CBS teased that Big Brother 27 would introduce a surprise “Mystery Houseguest” ...

After much anticipation, Big Brother Season 27 revealed the mystery houseguest. Former contestant and winner of the ...

Before the season 27 premiere, many fans speculated that the mystery houseguest could be anyone from Celebrity Big Brother UK ...

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

A Big Brother legend entered the house in season 27's premiere, and ahead of their time in the BB house, they share a surprising reason for playing.

Rachel Reilly storms into Big Brother 27 as the mystery houseguest, bringing her signature sass and strategy. “Reality ...

Rachel Reilly returns to the Big Brother house as part of a new mystery twist, joining the game as the 16th player and facing off with a brand-new cast.

The first cheesy segment of the season then occurred: An odd man in a red mask appeared on the TV and said he was behind the ...

Big Brother has returned to the screens with a new season. The 27th season of the reality show premiered on July 10, and the ...

"Big Brother" revealed its mystery houseguest for season 27 Thursday: the legendary Rachel Reilly. Reilly entered the house ...