"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 ...

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

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

Big Brother 27 mystery houseguest Rachel Reilly is married to Brendon Villegas. They have two children - daughter Adora ...

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

"Big Brother" 27 continues after premiere week. Here's what days "Big Brother" is on and what time "Big Brother" comes on ...

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

Rachel Reilly opens up about returning to Big Brother 27, balancing motherhood, and her plans to compete for the $750,000 ...

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

From bikinis to board shorts, Big Brother 27 contestants dazzle in their backyard swimsuit photo shoot in Us Weekly's ...

Janelle Pierzina and Rachel Reilly tease Big Brother fans with hints about the mystery houseguest in season 27 ...