The I'm A Celebrity... Get Me Out Of Here spin-off show will be the main camp's "naughty little brother", according to host Vicky Pattison.
The show will return to ITV2 with a new name, new presenters and a new format after the main ITV show hosted by Ant and Dec.
I'm A Celebrity: Extra Camp will be hosted by former winners Pattison, Joe Swash and Stacey Solomon, as well as comedian Chris Ramsey to replace I'm A Celebrity... Get Me Out Of Here Now, which was hosted by Joe, Laura Whitmore and David Morgan.
The show will feature unseen clips, interviews and bushtucker trials, and Vicky said: "I feel like we're the main camp's naughty little brother, so we get away with more.
"I think we're definitely going to cut loose and be little rascals. Ant and Dec are the big brothers and we're the naughty little brothers."
Vicky, who won the show last year, said she has mixed feelings about returning to the jungle when she is not a contestant.
She said: "For me the only thing I'm dubious about or a little bit nervous (about), is for me it's the first year I'll be going back to it.
"I'm a bit gutted about how jealous I'm going to be, because it's an amazing experience.
"The feeling you get when you're in there - of achievement, of teamwork, of camaraderie, everything you get from being an official campmate - is something you can't recreate.
"I've come to terms with that this year, that's a feeling I'm never going to regain."
The former Geordie Shore star said she is determined to focus on doing a good job on the show so won't have any of her pals flying out to keep her company in Australia.
She said: "I really want to focus on this and I really want to be really good at it. It's my first proper opportunity like this and I've made no secret of the fact that I'd love to have a career with a bit of longevity to it.
"I'm a little bit in awe of everyone else, I feel like they've had a lot more practice than me.
"I'm just really nervous and the last thing I need is someone coming out and distracting me, because I know what I'm like, I'll get drunk and do something silly.
"I just want to focus on it and do something good."
The hosts will also compete in live studio games and Stacey, who won the show in 2010, said: "We might be going in competition with the main camp. I'm just happy I'm not doing trials for people's food this time."
Joe, who won the show in 2008 and is Solomon's partner, said: "You can't buy a holiday like this. It's like a holiday but with the worst room service ever."
I'm A Celebrity... Get Me Out of Here starts at 9pm on ITV on Sunday, with Extra Camp starting at 10.45pm on ITV2.