The identities of the housemates have been kept a massive secret by the BB makers.
They haven't met each other and have been locked away in secret locations away from telly and newspapers.
But at 8.30pm the country will finally find out who they are when they enter the house to try and win £70,000.
The house has been given a face-lift to make it cosier with lots of rounded edges and soft, cool colours.
Which should help the housemates stay calm when things get heated!