Katie Price tried to crack on to Declan Donnelly at the wrap party for her I'm A Celebrity... Get Me Out Of Here! series in 2004, despite having already hooked up with Peter Andre in the jungle.
The wild glamour model, who went into the show with a boyfriend before moving on to Peter, then attempted to get with the coupled-up Dec at the end of filming, his telly partner Ant McPartlin revealed.
Ant recalled the shocking seduction attempt in his and Dec's 2009 autobiography Ooh! What A Lovely Pair, bringing up their heavy drinking session with I'm A Celebrity series 3 winner Kerry Katona.
"The other thing I remember from that party is doing shots with Kerry, and Jordan [Katie's glamour model alter-ego] chasing after Dec, who she had propositioned during her departure interview," Ant wrote.
Even after Dec - who at the time was in a relationship with childhood sweetheart Clare Buckfield - had given her the brush-off, Katie got her mum Amy Price involved.
Ant went on: "He managed to avoid her all night, but her mum did corner him a couple of times and try to set him up with her. He wasn't having any of it."
Katie by then was already seeing Pete, who she would go on to marry and have two children with - Junior and Princess.
But she'd also been in a relationship with Scott Sullivan before going into the jungle and publicly cheating on him.
Dec wrote in the same book: "I don't think anyone would have put Peter and Jordan together before the series. She had a boyfriend when she went in, and no one had heard from him [Peter] for years - to most people he was a cheesy nineties pop star.
"It was the first time two people began a relationship on the show, and it was fascinating to watch. We were so excited, me and Ant even talked about getting hats for their wedding, like Cilla used to on Blind Date."
The same night Katie tried it on with Dec, Ant admitted to storming off in a mood because no-one wanted to keep drinking with him.
Ant - who last year was fined £86,000 and banned from the road for 20 months after his drink-driving crash - had huffed off to the beach near their Queensland hotel with some beers and his CD player in the early hours of the morning.
He texted Ali Astall - at the time Ant and Dec's personal assistant, before becoming Dec's wife - to ask her to join him for a swim on the beach, but she panicked and thought he'd gone for a drunken trip to the hotel swimming pool.
"She knew I was in a party mood and she was terrified I'd gone for a drunken swim in the hotel pool. Finally she headed for the beach and found me, sitting cross-legged on the sand listening to music and with a face like thunder - all because no-one wanted to party with me," Ant wrote.
"I was in such a bad mood I thought nothing in the world could make me feel more irritated. Then Mother Nature intervened and proved me wrong. A huge wave appeared and washed my CD player and speakers into the sea."
*I'm A Celebrity 2019 launches Sunday November 17 at 9pm on ITV
