Big Brother 2025: Cast Leaks, Premiere Date, and Game-Changing Twists Revealed

The iconic reality juggernaut returns this summer, and Big Brother 2025 already looks primed to dominate water-cooler talk and social media timelines alike. Below is everything fans and curious newcomers need to know before Season 27’s doors slam shut and the 24/7 cameras start rolling. H2: When does Big Brother 2025 start? CBS kicks off Big Brother Season 27 with a supersized 90-minute premiere on Thursday, July 10 (8 p.m. ET/PT). New episodes then settle into the familiar Sunday/Wednesday/Thursday schedule, while Paramount+ launches the live feeds on Sunday, July 13 at 11:30 p.m. ET, immediately after the West-Coast broadcast. H2: A “Summer of Mystery” inside the “Hotel Mystère” Producers are leaning hard into immersive storytelling this year. The entire house has been transformed into a boutique hotel dubbed “Hotel Mystère,” and host Julie Chen Moonves teases that the season-long theme, “A Summer of Mystery,” will infect every competition, twist and vote. Hidden passageways, secret service bells and a constantly shifting set of house rules promise to keep even veteran superfans guessing. H2: Meet the Big Brother 2025 cast Seventeen fresh houseguests (one identity still under wraps) are checking in this season, ranging from a former drone-racing champion to a middle-school guidance counselor and a viral ASMR creator. Early fan chatter is centering on: • Ava Pearl, an Atlanta-based pop singer with 3 million TikTok followers. • Cliffton “Will” Williams, a Houston firefighter who says he’s “studied every eviction in franchise history.” • Ashley Hollis, an ex-CIA linguist whose secret-keeping skills could prove invaluable. For the full roster—including ages, hometowns and official photos—visit the newly released cast gallery. H2: Game-changing twists already confirmed • Mystère Keys: Golden keys hidden around the hotel grant week-long immunity but also saddle the holder with a public handicap, such as sleeping in the lobby. • Guest Check-Out: Viewers will vote each week to “evict” one luxury item from the house, forcing strategic scrambling. • Secret Suite: One unfinished fifth-floor suite will unlock mid-season, offering private intel to the lucky occupant—if they can survive the night alone. H2: How to watch, stream and interact • Live Feeds: Exclusive to Paramount+ with multi-camera angles and flashback features. • Episode Replays: CBS.com and the CBS app post new episodes the morning after broadcast. • Digital Extras: Weekly “Mystère After Dark” streams dissect secret clues dropped in the decor. • Fan Voting: The official Big Brother app will power America’s Vote for the first-ever “Check-In Challenge,” giving one player safety before nominations. H2: Why Season 27 could redefine Big Brother Twenty-six seasons in, the franchise has never leaned this heavily into narrative world-building. By transforming the house into a living escape-room and letting viewers eliminate creature comforts, Big Brother 2025 blurs the line between strategy game and interactive drama. Expect unprecedented alliances, viral late-night feed moments and a ratings surge as nostalgia meets next-gen engagement. The hotel doors open July 10; after that, every move, whisper and confession will stream in real time. Grab your room key—Big Brother 2025 is ready to check you into the most unpredictable summer yet.