"So no, I don't think doing this will be tougher", said the 71-year-old.
He said he won't mind missing meals but will struggle to be without his wife, Sandra.
The show returns this Sunday 18th November.
"We do everything together", he said.
He said: 'I think she's gonna be absolutely brilliant and I'm really excited to see her on the show and everyone's reaction to her is gonna be brilliant because she's so flawless'.
"My character is so different to me. I want to keep myself busy".
Kelsey Merritt makes impressive debut at Victoria's Secret Fashion Show 2018
Rising models Kendall Jenner , Bella Hadid , Winnie Harlow , and Gigi Hadid also walked during last night's exclusive event. The Victoria's Secret fashion show airs in the United States on December 2 .
'I think it will be really fun and I'm really excited because she's never been over or seen it.
He said: "I think some people may have a problem with me".
But he confessed he was dreading any coffin-style challenges. I've done a Bushtucker Trial.
The 25-year-old, who has a girlfriend, is not too anxious about the creepy crawlies but thinks the boredom will be his biggest struggle.
"I am so much more nervous about this than I would be going on stage to perform a gig", he said.
"I will have to really figure that one out when it happens as I know filming Torchwood, there was a scene where we filmed in a coffin". I think it will be quite structured in there.
The new I'm A Celebrity.
Samsung reveals foldable phone, Latest World News
Samsung first unveiled a prototype for a foldable phone in 2014, which looks vastly different than the one we saw on Wednesday. Bixby started as an intelligent interface, a practical way to use voice to interact with your phone.
"But being surrounded by people I can't get away from, or those who talk all the time, can be a source of stress".
Meanwhile, last year's victor Georgia Toffolo was reportedly paid "just" £13,000 ($16,800).
The single star, 20, is claustrophobic, so may find some of the tasks a little tough.
He said: "Everyone has phobias and I am terrified of some of the things on the programme". I can go all day without eating until the evening. Yes, she played Charlotte Hinchcliffe - the one Simon Bird's character failed to woo on more than one occasion, but now she'll have to listen to Harry and his transfer stories. "I want both crowns".
They are among 10 stars who will undertake challenges in the Australian jungle for up to three weeks. "I also like the fact that Ant and Dec so clearly love their job and do it so professionally".
Lion Air plane crashes into lamp pole on Indonesian airport runway
The Lion Air crash was the first involving the type of plane, which airlines introduced into service previous year . The warning is based on preliminary findings from the accident involving a Lion Air jetliner, a source said.