Big Brother 11 Contestants and Twists Revealed

CBS has finally revealed the latest Big Brother house guests and twists!

Who are the house guests? They are an interesting bunch that includes a bikini model and a neuroscientist. Meet them here.

And what's the big twist? The house will be divided in four teams based on the contestants' former high school cliques -- popular kids, off-beat kids, athletes, or brainiacs. Each clique will compete for power, luxuries, and food in the Big Brother house, which has an eco-friendly theme this season.

In another twist, the cast will find out that a 13th houseguest will be joining the show. The 13th contestant may give one clique an advantage in the game.

Big Brother 11 premieres Thursday, July 9 at 8 pm ET.

Photo of house guest Lydia courtesy of CBS.