Big Brother 27 Mystery Houseguest Revealed: Julie Chen Teases Polarizing Twist

Big Brother is officially back — and it’s bringing some serious heat (and chaos) this summer.

On July 10, CBS kicked off the premiere of Big Brother Season 27, set inside the ultra-suspicious Hotel Mystère. And let’s just say… the twists started rolling in fast — including a masked visitor, a secret accomplice, and, most buzzworthy of all, a mystery 17th houseguest that no one saw coming.

Julie Chen Moonves standing in front of a promotional backdrop for Big Brother Season 27, teasing the arrival of a mysterious houseguest
“Promotional image for Big Brother Season 27 featuring host Julie Chen Moonves. This season’s mysterious houseguest promises to shake things up. This image was AI-generated.

“This person is going to be very polarizing.”

Host Julie Chen Moonves teased the chaos early in an interview with Entertainment Weekly:

“When I found out who the mystery houseguest was, I was shocked. This person is going to cause strong reactions — in both directions.”

That’s right — love or hate, there’s no in-between. Julie even called it “an epic casting decision” and promised this wildcard guest would leave jaws on the floor.


Premiere Night Reactions? Total Mayhem.

Big Brother Season 27 houseguests reacting in shock during the dramatic premiere night reveal.
Premiere night mayhem! Houseguests were caught completely off guard during the epic entrance of the mystery guest. (This image was generated using AI and may not represent actual scenes from the show.)

Let’s talk about what happened when the 17th guest finally walked through that door.

  • Ava literally froze with her mouth wide open

  • Morgan started flailing her arms in disbelief

  • Zach was so shocked, he vanished from the camera frame

  • Ashley gave a gasp that was pure reality TV gold

In short? It was messy, dramatic, and absolutely perfect for Big Brother.


A Season of Secrets: What’s Hotel Mystère Hiding?

This year’s theme — Hotel Mystère — isn’t just for aesthetics. Julie explained it like this:

“Nothing in the house is what it seems. You might look at a random object and think it’s ordinary… but it’s not. Every single detail could mean something.”

There are hidden clues everywhere, from the artwork to the bunk beds (which apparently look like a luxury 1920s European train car!).

Lesson? Observation is survival.


Meet Some of the Houseguests Bringing the Drama

Name Occupation What Stands Out
Lauren Domingue Bridal Consultant Sweet Southern vibe, but a fierce fighter
Clifton Williams Sports Podcast Host High energy, total entertainer
Amy Bingham Insurance Agent Social butterfly and strategist
Ashley Hollis Lawyer No mercy, all game
Keanu Soto Personal Trainer Empathy + improv = powerful mix
Jimmy Heagerty Strategy Consultant Master manipulator, timing is everything

And of course… there’s that 17th mystery guest we’re all dying to decode.


When & Where to Watch

🗓 Airs on CBS: Every Wednesday, Thursday, and Sunday
📺 Season Premiere: July 10 (90-minute special episode)
🎥 Live Feeds: Delayed this year — and fans aren’t thrilled


Final Thoughts: Who Can You Really Trust?

Alliances, betrayals, and shocking twists — Big Brother 27 isn’t just a reality show. It’s a mind game.

So the big question is:

Who’s got your back? And who’s playing you like a fiddle?

Let the summer drama begin. 🔥


🎨 Header and preview images were AI-generated and may not reflect actual house scenes.

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