Big Brother will be "more twisted than ever" this year, according to the Channel 4 reality show's producers.
Thousands of hopefuls auditioned for this year's Big Brother
Housemates will share one bedroom and one bathroom, all surrounded by glass walls. Executive producer Claire O'Donohoe said: "Cosy is not the word."
The house, where contestants will live for 13 weeks from 18 May, will be "inside out", with grass in the kitchen and carpet in the garden.
About 25,000 hopefuls applied to join the show, now in its seventh series.
No place to hide
Ms O'Donohoe said this year's contestants would be more exposed than ever.
"There are more glass walls in the house design and no hidey holes like last year's loft," she said.
"So the housemates will find it very difficult to get away from one another."
Contact with the outside world is forbidden, so housemates will also be forced to miss the World Cup.
A member of the public will win a place in the house by finding a golden ticket inside a chocolate bar.
One hundred tickets will be placed in Kit Kat bars and the winner will be picked at random during a live TV show.
Big Brother has scored massive ratings for Channel 4 since its debut in 2000.
Last year, 7.8 million people tuned in to see disco dancer Anthony Hutton win the show's £50,000 prize.
But the show's biggest audience came in its first year, when 9.5 million watched the series finale.
The company behind Big Brother, Dutch production firm Endemol, has sold the format to 37 countries worldwide.