About a dozen of your favourite former contestants will battle it out onscreen for two weeks in a bid to become Ultimate Housemate.
'It will be a nostalgic treat for people who love the show, and remind us why it was so great,' says Big Brother boss Phil Edgar-Jones.
'Some old faces have been asking for weeks if we're bringing them back, saying they want in.
'Billi Bhatti and Nikki Grahame have both been asking.
'It's a bittersweet moment with Big Brother ending, but the Ultimate Champion will ensure we end on a high.
'As well as finding fans' favourite housemate, it will also be a trip down memory lane as they discuss experiences in the house.'
The new - and final - series of Big Brother begins tonight at 9pm on Channel 4.
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Kate Lucey
