The I'm A Celebrity 2012 is being kept so secret this year, that even the show's presenters aren't sure who's going in.
Main show hosts Ant and Dec flew out to Australia this week ahead of the new series, which starts on November 11.
The Geordie duo will be joined by Laura Whitmore and Joe Swash, who front ITV2 spin-off show I'm A Celebrity... Get Me Out Of Here Now.
And this year the spin-off series will see the pair presenting the show with stand up Rob Beckett, who replaces Russell Kane on the series.
He said: “I’ve watched every series with my family since I was a kid.
“As long as the spiders stay well away from me, it will be an amazing few weeks.”
Speaking ahead of the new series starting later this month, Joe revealed that bosses were refusing to reveal what stars would be entering the jungle.
He said: “All we need to know is the full line-up.”
Stars said to be on this year's I'm A Celeb line up include former Coronation Street star Helen Flanagan, singer Grace Jones, comic Brian Conley, darts champ Eric Bristow, actress Linda Robson and ex England cricketer Matthew Hoggard.
TOWIE's Maria Fowler and Pussycat Doll Ashley Roberts have also been linked to the series, with the full line up expected to be revealed next week.
Speaking about the new series recently, Ant and Dec teased: "We can't wait to get out there!"
Dec added: "It's series twelve, we've got some great celebs going in... and some twists!"
Meanwhile, spin-off host Laura said: "I can't believe it's come around to that time of year again, but I can't wait.
"I've a feeling it's going to be the best year yet. Last year was my first and it was quite daunting, so it's an honour to be asked to go back and see everyone again like Ant 'n' Dec and Joe Swash."
[cat c="i'm a celebrity"]I'm A Celebrity 2012[/cat] starts on November 11.