He and co-star Ant McPartlin are having to wrap up warm this year for the ITV favourite as it has moved from its usual home of Australia to Wales.
Rather than shorts and thin shirts, Ant and Dec have been presenting from Gwrych Castle in thick coats – but Dec’s caught viewers’ attention.
The Geordie lad wore a muddy brown overcoat with what appeared to be a couple more layers of warm clothes underneath.
But I’m A Celeb fans were sure he’d accidentally picked up a coat that was a few sizes too big, as the bottom hemline fell well below his waist.
The eagle-eyed viewers flocked to Twitter with their observations, with some wondering if Dec had picked up the wrong coat.
One said: “Think Dec shopped in the men’s section rather than the children’s. The coat looks a bit big.”
Another wrote: “Big game of coats from Ant and Dec there.”
A third tweeted: “Who’s coat has Dec borrowed for the opening scene? Looks like a kid at Bonfire Night.”
Someone else simple put: “Dec’s coat. That is all.”
And a fifth joked: “Why is Dec wearing Vernon Kay’s jacket?”
That wasn’t the only wardrobe blunder of the evening though – however the other was done on purpose.
Taking to their official Twitter account, the best friends and legendary hosting duo shared a photo of them from the castle wearing off socks.
They wrote: “We’re the only pair you’ll find around here! Wearing odd socks for tonight’s show in support of Odd Socks Day, Anti-bullying Week.”
Ant wore one brown wooly sock and a patterned blue one, while Dec went for a simple white sock and a red, brown and blue striped design.
I’m a Celebrity… Get Me Out of Here! continues tonight at 9:15pm on ITV