Ant and Dec meet Louise, Snoochie, Danny and Naughty Boy and show them the structure where they'll be completing their first challenge.
Ant reveals this year will be "tougher than ever" as he tells them they'll have to try and win the keys to the castle, but they won't be doing it as a team and will instead go head-to-head with one another.
Louise will take on Danny and Naughty Boy will face Snoochie. The winners of each challenge will form the red team and the winning team will choose two celebs from the next team to compete.
The winners will have access to main camp, beds and eat tonight, while the losing team will be banished to the Castle's new feature - The clink.
For the challenge, each contestant will have to make their way along a plank, which is 213ft above a lake.
At the end of the plank is a buzzer, which each contestant will have to press with their foot when alerted. The person who touches it the quickest will win, and the other person will be dropped - just lovely!