I'm A Celeb camp-mates' furious reactions behind the scenes to first challenge

Ant McPartlin has revealed I'm A Celebrity contestants turned the air blue after discovering a swimming challenge was up first.

He revealed all on Extra Camp - and said the news couldn't have gone down any worse.

The presenter didn't name names but said there was plenty of off camera swearing as the stars grumbled about being chucked in at the deep end.

Appearing on the the ITV2 spin-off show alongside Ant, Declan Donnelly says he is glad he ducked telling the camp-mates about the watery blow coming their way.

Ant said: "Nobody liked the news. There were quite a few swear words!

There were some very worried faces in camp (DIGITAL/EROTEME.CO.UK)

The stars didn't hold back after being hit with the news (DIGITAL/EROTEME.CO.UK)

I just gave the news and walked off - there was quite a lot of bitching, believe me!

"But to be fair, they eventually just got in and got on with it."

Dec joked: "I'm glad Ant revealed that... I would have given in and said 'don't worry, you don't have to do it'."

There weren't many people laughing - except the hosts! (ITV/REX/Shutterstock)

Meanwhile John Barrowman worried I'm A Celebrity fans after his appearance on Extra Camp.

The 52-year-old looked almost unrecognisable as he sported shaved gray hair on the show.

And fans flocked to Twitter to comment.

One tweeted: "John Barrowman looking unrecognisable on #ExtraCamp #ImACeleb."

But they 'got on with it' eventually (DIGITAL/EROTEME.CO.UK)

While another commented: "Not trying to be rude but is John Barrowman okay? He looks completely different, didn't recognise him at first #ImACeleb #ImACelebExtraCamp #ExtraCamp."

A third questioned: "Has John Barrowman been poorly ? #ExtraCamp."

Another wrote: "What the hell, John Barrowman looks and even sounds so different #ImACeleb #ExtraCamp."