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

Rachel Reilly is back in the Big Brother house, and fans are either cheering or ready to change the channel. The Season 13 champ made a surprise entrance on the July 10 premiere of Big Brother 27 as the long-rumored “mystery houseguest,” after CBS teased her return with a week of cryptic clues.

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

Big Brother host Julie Chen Moonves will weigh in on the latest events inside the house. This week, she reacts to being abducted by the Mastermind, Rachel Reilly’s return as the mystery houseguest, playing for the first Head of Household win,

Julie Chen Moonves teased that Big Brother has resulted in "more marriages than The Bachelor " in its 25-year history The longtime host exclusively told PEOPLE it "warms my heart" to see relationships forged on the show stand the test of time At least six couples who met on Big Brother are married with families of their own today,