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

Warning! The following contains spoilers from the Big Brother live feeds as of Wednesday, July 16th. Stream the live feeds ...

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

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

F loaters, grab a life vest! Rachel Reilly made her triumphant return to Big Brother during Thursday's Season 27 premiere.

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

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

As Big Brother celebrates its landmark 25th anniversary this year, host Julie Chen Moonves sits down for an exclusive interview in which she reflects on her journey with CBS' iconic reality TV show ...

In the weeks leading up to the premiere of 'Big Brother' 27, CBS teased a 17th mystery houseguest. The identity of that ...

The first person to enter the Big Brother house has never won the game, but that curse may be broken with this Big Brother ...

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

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