"There's nothing tougher than being a manager of a football team when things aren't going well", he explained. "If somebody is not motivated to get those stars, I might be unforgiving".
"We do everything together", he said.
Asked whether she's likely to cry as much as she does on "This Morning", she said: "It's not crying I'm anxious about, it's screaming".
Atack is best known for playing Charlotte Hinchcliffe in hit comedy The Inbetweeners.
"My character is so different to me. I want to keep myself busy".
"It was see-through and so I could see space but I couldn't do it".
Knowles, 56, is single but has ruled out finding love in the jungle.
"It is obviously tinged with sadness that Ant won't be coming this year, I'm going to really miss him, but it's only for one series and he'll be back stronger next year".
But he confessed he was dreading any coffin-style challenges.
"I am scared of everything you have in there and I am scared of all the trials", she said.
McVey is a member of The Vamps, who have had success with songs such as Can We Dance and Last Night.
"He said he couldn't advise me more to do it as he had the best time ever".
The single star has Asperger's but does not want her fellow celebrities to feel sorry for her.
Their executive producer told me that the first thing they did when they were setting up the show was to get out the tapes of Noel's House Party.
"So no, I don't think doing this will be tougher". Get Me Out Of Here! contestants.
Malique Thompson-Dwyer - aka Prince McQueen on Hollyoaks - also admitted to some trepidation. Well, I haven't done it, but I've watched one'.
He said: "I have got bad eating habits. I know it's a game and I am not going in to be a misery", Barrowman added.
The former Tottenham Hotspur and West Ham manager, and father of retired footballer Jamie Redknapp, also said that his sporting colleagues will be surprised to know he has signed up to the show. (Stuart C. Wilson/Getty)Who is John Barrowman?