Big Brother 2025: Launch Date, Rumored Cast, and Game-Changing Twists Revealed

The wait for Big Brother 2025 is almost over, and CBS is promising its most mysterious summer yet. Season 27 of the long-running reality juggernaut kicks off with a 90-minute premiere on Thursday, July 10 (8 p.m. ET/PT), followed by another supersized 90-minute episode on Sunday, July 13 (8 p.m. ET/PT). H2: A New Address: Welcome to “Hotel Mystère” CBS has transformed the infamous Big Brother house into a high-concept boutique hotel dubbed “Hotel Mystère.” Expect checkerboard floors, secret passageways, a Victorian conservatory lounge and even a boxing-ring gym, all designed to amplify paranoia and gameplay twists. H2: Season 27 Theme — “A Summer of Mystery” Producers are leaning hard into suspense. According to the official synopsis, opening night will unleash: • A masked visitor who can influence nominations • A secret accomplice working from inside the cast • A “Mystery Houseguest” whose identity stays hidden until a game-changing live reveal. Host Julie Chen Moonves teases that this unknown player is “the most polarizing houseguest we’ve ever had”. H2: How to Watch Big Brother 2025 • CBS broadcasts: Thursdays, Sundays and extended 90-minute Wednesdays all summer. • Live feeds: Paramount+ and Pluto TV begin streaming 24/7 footage Sunday, July 13 (9:30 p.m. PT). • New companion show: Big Brother: Unlocked airs every other Friday starting July 25, bringing alumni analysts back to dissect the game in real time. H2: Prize, Cast & Rumor Mill While the grand prize remains the traditional $750,000, CBS is keeping the Season 27 cast under wraps until premiere night. Fan chatter has linked several standout strategists from recent seasons to cameo roles in the Unlocked panel, but insiders say the core roster will be “all-new houseguests” ready to celebrate the franchise’s 25-year milestone. H2: Why Big Brother 2025 Matters • Anniversary buzz: Two and a half decades after debuting in 2000, the show still dominates summer TV ratings. • Streaming synergy: Paramount+ live-feeds and PlutoTV simulcasts court cord-cutters and expand social media engagement. • Interactive twists: The masked visitor and mystery houseguest are tailor-made for hashtag speculation, likely to keep “Big Brother 2025” trending nightly. H2: Final Check-In Whether you’re a superfan tracking every alliance or a casual viewer lured by Hotel Mystère’s eerie aesthetic, Big Brother 2025 promises an addictive blend of strategy, suspense and 24/7 drama. Set your DVRs (or cue up Paramount+)—because once the house doors slam shut on July 10, the only thing that’s certain is that nothing is certain inside Big Brother Season 27.