One person who has already made their mark in the camp is Emmerdale star Danny Miller who is best known to viewers at home for his much-loved role as hardman Aaron Dingle.
So, could his time as Aaron be responsible for his decision to head into the jungle?
"I’m A Celebrity is the biggest show in the country and I want to show people what I am like as Danny rather than as Aaron," revealed Danny to ITV.
"It will be nice for people to see me not crying but having a laugh! I am a fun guy at home and I’ve been known as Aaron now for 13 years – it’s good to step outside your comfort zone."
So, as Danny faces some horrifying trials in the Castle, here is all you need to know about Emmerdale actor Danny Miller.
Who is Danny Miller?
Danny Miller is an English actor who is best known to audiences for his role as fan-favourite character Aaron Dingle in ITV soap opera Emmerdale.
After previously having a small role in Grange Hill for eight episodes, Miller joined Emmerdale in 2008.
Enjoying multiple high-profile storylines including his character’s tumultuous coming out journey, Miller left the soap in 2012.
He has also appeared in BBC drama Jamaica Inn, ITV drama Lightfields, and also the ITV crime series Scott & Bailey.
Miller returned to Emmerdale in 2014 and has appeared on the soap since, with his highest-profile story surrounding his romance with Robert Sugden.
His current storyline has seen Aaron struggle with his sister Liv Flaherty's alcoholism.
Is Danny Miller leaving Emmerdale?
It was revealed before Danny entered the Castle that he had departed Emmerdale ahead of the show.
On Danny Miller's exit from the soap, an ITV spokesperson commented: " “Danny has achieved so much during his time at Emmerdale playing the role of Aaron. He has had to tackle some of the hardest-hitting storylines and has made a lasting impact on the show.
“Aaron is a character our viewers took into their hearts and have followed his rollercoaster journey for years. Danny will be hugely missed and we wish him all the best going forwards.”
The character has yet to depart our screens but Aaron Dingle's final scenes will air in the coming weeks.
What has Danny Miller said about joining I’m A Celebrity 2021?
Danny has revealed that he decided to do the show after discussions with his fiancée Steph, with whom he recently welcomed his first child.
“Steph and I had a long discussion about me taking part in I’m A Celebrity,” admits Danny. “We were due to start IVF earlier this year and that would have meant the baby would have been due next March, so it wouldn’t have mattered.
“But then a miracle happened and Steph fell pregnant (without IVF). I knew my baby would only be about a month old when I went into the Castle. I was worried about leaving the baby with Steph on her own but she is a midwife and I know our baby will be in perfect hands. She has been incredibly supportive and she knows what a great opportunity this is to take part.”
Miller looks forward to stepping out of his comfort zone and showing Emmerdale fans that he is nothing like Aaron Dingle.
Apart from dreading the trials, Miller anticipates he will be a shoulder to cry on for his other campmates.
Danny is close friends with former Emmerdale co-star and I’m A Celebrity contestant Adam Thomas.