"Big Brother" is back with 16 new houseguests ready to compete for a whopping $750,000. Everyone's favorite summer reality show returns Wednesday with another season full of competition, backstabbing and secret alliances. And because it's the show's 25th anniversary, fans can look forward to seeing "twists that will send the Houseguests spiraling into another universe." "Big Brother" 25 premieres at 8 p.m. on Aug. 2, 2023, with a 90-minute live move-in event. But first — it's time to meet the houseguests.