It was in the year 2000 that Julie Chen Moonves made her debut as the host of the hit CBS reality show Big Brother, which places a handful of strangers in isolation as they compete for a chance to take home a hefty prize.

Speaking exclusively to PEOPLE ahead of the premiere of Big Brother 27, Chen Moonves, 55, reflects on the 25th anniversary of the reality competition series and shares who she'd want to replace her if the time ever came for her to say goodbye to the summertime staple.

We're chatting with Julie Chen Moonves, the host of the hit summer reality series on CBS, "Big Brother." The show is back and she's telling us what to expect in this mysterious new season!