Noel Edmonds" fear of water could be his "downfall" on "I'm A Celebrity... Get Me Out Of Here!".
The "Deal or No Deal" presenter is expected to be a late addition to the jungle camp and though his former partner Marjan Simmons - who he dated for a year in 2005 - insists he'll attempt any challenge he's asked to, she's not sure he'll cope too well with certain tasks.
She said: "He hates [water]. so I am not sure how he'll cope during some of the trials.
"We once went snorkelling in the Maldives on a romantic break.
"We'd been in the water five minutes and he started to freak and wanted to get out. Maybe that's what will be his downfall on I'm A Celeb. But he's someone who doesn't give up.
"He'll push through to the brink. He won't say "I'm A Celebrity...Get Me Out Of Here". I'd put money on it.
"And he'll eat anything. He normally likes exquisite food but I reckon he'd eat kangaroo balls."
The 57-year-old artist manager is also unsure how well the 69-year-old presenter will cope without his "meticulous" grooming routine.
She told the Sunday Mirror newspaper: "Everything has to be in order. I'd be ready in 10 minutes and he'd take 45 minutes.
"He'd blowdry his hair, style his beard. In my head I thought - how long is he going to be?
"For a man to be so meticulous about his hair and grooming I found a little odd. But that's his character.
"He'll have to do a spit and polish with his hair Down Under.
"I never once saw him unshaven - his beard was always immaculate. With no razor who knows what he'll look like? I wonder if he'll shave it all off before he goes?"
Marjan is keen for her former partner to do well on the show and thinks he'll get on well with the rest of the camp.
She said: "He's a friendly person so he'll get on with the celebrities. I'm wondering if in the heat he'll get a temper.
"He might have a few outbursts - not at people, but at the situation. I wish him every success on the show and think he will do brilliantly.
"He broke my heart but he's not a player and I wouldn't change a thing. I hope he is happy and does well Down Under."