[6][7] The first teaser trailer, featuring hosts Chris Brown and Julia Morris in a burlesque-style parody of Monty Python's "Always Look on the Bright Side of Life", was released on 20 November 2021.
[4][8][9] On 2 January, the first two contestants were revealed by Network 10, prior to the premiere of the first episode, to be celebrity chef and television presenter Poh Ling Yeow and former AFL coach Nathan Buckley.
[10][11][12] On 3 January, former NRL player and television presenter Beau Ryan was the third celebrity also announced as a contestant prior to the show's premiere.
[15][16][17] The twist was similar to that of the fourth series of Celebrity Big Brother UK which saw non-celebrity Chantelle Houghton undertake the same task.
During the five days that Poh had to keep the fake contestant a secret, she received help from the camp's intruders, Joey Essex and Davina Rankin, who pretended to have known David.
In episode 8, Nathan and Poh received a secret mission in which they had to sneak out of camp to the Tok Tokkie after all their campmates had gone to sleep.
In the Tok Tokkie, they were given ingredients to make a bowl of popcorn in the camp's treehouse, which they had to do without raising the suspicions of their campmates.
As Brooke succeeded in her mission, she won the camp english muffins with baked beans for breakfast.