Administrators to Jamie Oliver's UK restaurant chain say 22 sites have closed, resulting in 1,000 redundancies, after the business collapsed.
KPMG said that attempts to bring new investment to the celebrity chef's business – at a time of increasing costs and the confidence of vulnerable consumers – had failed.
The business was left without enough money to trade during his administrative work, which meant that all but three of his 25 restaurants were closed.
Three sites at Gatwick Airport in London will continue to trade "in the short term", said KPMG.
Jamie Oliver said he was "very sad" as the collapse was announced.
It will mainly affect the chef's Italian restaurant chain – which has 23 stores in the UK – but also its Barbecoa restaurant and Fifteen restaurant in London.
There is one Italian restaurant Jamie in Ireland, based in Dundrum Town Center – but the UK company has said that the company's international restaurant franchise business will continue to trade as usual.
Y Irish Times reports that the franchise operator here is still planning to expand in the coming months.
In a statement confirming the UK administration, Jamie Oliver thanked all the staff and suppliers – saying it was "very sad by this outcome".
He said: "I appreciate how difficult this is for everyone affected. T
"I would also like to thank all the customers who have enjoyed us and supported us over the past decade, it has been a great pleasure to serve you.
"We launched Jamie's Italian in 2008 with the intention of disrupting positive eating in the middle market in the UK's high street, with great value and superior quality ingredients, best animal welfare standards. T in the class and an amazing team who shared my passion for great food and And we did just that. "
I have destroyed that our popular restaurants in the UK have gone into administration. I feel very sad about this result and would like to thank all the people who have put their hearts and their souls to this business over the years. Jamie Oliver
– Jamie Oliver (@jamieoliver) 21 May, 2019
Jamie's Italian has faced significant financial challenges in recent years, with Mr Oliver investing £ 13 million (€ 14.8 million) previously to save the chain of bankruptcy.
Twelve outlets of the company had already closed in an attempt to save the business.
Main photo: File photo of Jamie Oliver's Italian restaurant. Photo by: Nick Ansell / PA Wire / PA Images