The broadcaster said the coronavirus pandemic meant it “just wasn’t possible for us to travel and make the show” Down Under as usual.
That means bush tucker trials are out, but ITV promised similarly “gruelling trials and fun-filled challenges”.
ITV hasn’t revealed the location, apart from saying it’s “in the countryside”.
It has also not revealed whether the participating celebrities will live in the castle itself or in a camp.
“Our celebrities will probably have to swap shorts for thermals but they can still look forward to a basic diet of rice and beans and plenty of thrills and surprises along the way,” ITV Studios director of entertainment Richard Cowles said.
The company had “pulled out all the stops” to make the series happen in Australia, he said.
“Unfortunately, due to the ongoing Covid-19 pandemic and despite us looking at many different contingencies, it became apparent that it just wasn’t possible for us to travel and make the show there,” he said.
“However, we are all really excited about a UK version of I’m A Celebrity. While it will certainly be different producing the show from the UK, the same tone and feel will remain.”