Jamie Oliver's restaurant chain Jamie's Italian has appointed administrators, putting more than 1,000 jobs at risk.
The business said it had appointed KPMG to oversee the process, with a more detailed announcement expected later on Tuesday.
Mr Oliver said: "I am deeply saddened by this outcome and would like to thank all of the staff and our suppliers who have put their hearts and souls into this business for over a decade. I appreciate how difficult this is for everyone affected.
"I would also like to thank all the customers who have enjoyed and supported us over the last decade, it's been a real pleasure serving you.
"We launched Jamie's Italian in 2008 with the intention of positively disrupting mid-market dining in the UK high street, with great value and much higher quality ingredients, best-in-class animal welfare standards and an amazing team who shared my passion for great food and service. And we did exactly that."
It follows a hunt for a new investor in the brand, with a number of private equity firms touted as mulling bids for a stake in the business.