They'll be subjected to gruelling tasks in the Bushtucker Trials.
Let's keep Ant & Dec smiling!
Hopefully their diet is a lot more varied...
The Daily Star claims it's particularly important to ensure Ant's welfare, given he's just returned to work following a voluntarily stint in rehab to combat an addiction to alcohol and prescription drugs.
And he's been loving spending time with his partner in crime.
"I can't believe I'm so lucky to have the dream continue by being part of this incredible show and joining the ITV2 Extra Camp team, it's going to be so much fun".
Breaking his silence for the first time since seeking help, he told The Sun: "I'm excited to be back, I can't wait".
Dec added: "It's brilliant to be back together, it's flawless".
Meanwhile, Ant & Dec aren't the only famous faces to have touched down in Brisbane in recent days.
"It's just a shame for viewers back home in the United Kingdom who like to see the celebs enjoying the warm weather".
'We'll have the same old shenanigans, but with a few little added twists.
Let us know below who you've got your money on to win already!
Meanwhile Ant's wife Lisa Armstrong has remained in the United Kingdom where she works as a makeup artist on Strictly Come Dancing.
The final contestant on I'm A Celebrity will be footballer Jamie Vardy's wife, Rebekah, who met the Leicester and England striker after she was hired to plan his birthday party in 2014.
I'm a Celebrity.Get Me Out of Here! is back on ITV this Sunday (November 19) with its 17th - yes, SEVENTEENTH - series.
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