Anything and everything can go wrong on I'm A Celebrity... Get Me Out of Here!, so there's always a need for a back-up plan.
And today’s shocking revelation that Love Island star Olivia Attwood has already left the jungle after just 24 hours is testament to that.
The TOWIE star, 31 has been forced to withdraw from the show on medical grounds shortly after taking part in the first Bushtucker Trial of the series.
After jumping out of a helicopter with DJ Chris Moyles, Olivia is already thought to be on her way home to the UK to be with fiancé Bradley Dack.
Despite her incredibly short stint on the show, Olivia will get her full fee, which is believed to be in the region of £100k to £125k, due to a special clause in the celebrities' contracts.
As Olivia boards her flight back to the UK, a slew of celebs are secretly waiting in the wings to find out if they will be given a shot at appearing on this year’s show.
When a celeb departs so early into the series it can provide a major headache for show bosses.
Luckily, they make sure there is a standby ready in case of such a situation - and they get paid a staggering amount of money even if they don't make it into the jungle.
I'm A Celebrity Get Me Out Of Here's standby contestants get a generous fee of £20,000 along with a first-class flight to Oz - even if they do not step foot in the Australian Bush.
Used predominantly in the early series of the show, the standbys would be flown on a first-class flight out to Australia.
They are the behind-the-scenes secret that is put in place in case one of the contestants becomes ill or injured and must be removed from the camp prior to the voting lines opening.
Olivia joins a lengthy list of celebrities to quit the gruelling show but viewers will have to wait and see if her position is filled by one of the standby stars.
You would assume that the standbys would be relatively minor celebs, but bosses still managed to reel in some very famous faces.
One of the original back-up campmates was legendary TV favourite Keith Chegwin.
Cheggers, who sadly passed away in 2017 at the age of 60 after struggling with lung disease idiopathic pulmonary fibrosis, was drafted in as a standby contestant during the very first series.
Unfortunately, the much-loved presenter never made it into camp, which is a shame as he would have been a hilarious addition.
"We had stand-bys in those days, Keith Chegwin, just in case anybody pulled out," Ant explained during special recap show I'm A Celebrity...Jungle Story.
Dec added: "And he never got on."
Back in 2004, it was reported that Timmy Mallett had flown out to Australia to replace John Lydon if he decided to quit the show.
Former contestant Nicola McLean claimed Timmy was waiting to get on the show for a whopping three years before he actually entered the jungle with her in 2008.
"Timmy Mallett did that for three years before he got in, but that’s rare because most don’t go in the show," she added.
She previously told how the standby star set-up works.
Nicola, who has also appeared on Celebrity Big Brother , revealed in 2019: "Aside from the two latecomers, other celebrities are standby in case anyone gets injured or ill – but get sent home once the voting starts, as then it doesn’t matter if someone leaves."
The blonde added: "They travel first class, stay in a hotel and get paid £20,000. Timmy Mallett did that for three years before he got in, but that’s rare because most don’t go in the show.”
She also added that if a celeb is asked to appear as a guest on the spin-off show Extra Camp they will not be asked to appear in a future line up of the main series as they have been to the set and "see how it works too well."
