James Corden has been banned by the owner of the iconic Balthazar restaurant in New York.

Restaurateur Keith McNally — who has a history of booting celebrities from his eateries — said he barred the Late Late Show host, 44, due to his treatment of staff.

The 71-year-old also called the presenter a “tiny cretin of a man” and said he was the “most abusive customer ever”.

He claimed in online posts James had also behaved badly at his former restaurant, Café Luxembourg, on several occasions and left one server shaken.

“James Corden is a hugely gifted comedian, but a tiny Cretin of a man. And the most abusive customer to my Balthazar servers since the restaurant opened 25 years ago,” McNally wrote on Instagram.

“After eating his main course, Corden showed the hair to Balthazar manager G who was very apologetic.

“Corden was extremely nasty to G, and said: ‘Get us another round of drinks this second. And also take care of all of our drinks so far.”

McNally added on October 9 James had criticised his staff after his wife’s eggs were allegedly not prepared to her liking during brunch.

“Mr. Corden’s wife ordered an egg yolk omelette with gruyere cheese and salad. A few minutes after they received the food, James called their server, M. K. and told her there was a little bit of egg white mixed with the egg yolk. M. K. informed the floor manager, G. The kitchen remade the dish but unfortunately sent it with home fries instead of salad.

“That’s when James Corden began yelling like crazy to the server: ‘You can’t do your job! You can’t do your job! Maybe I should go into the kitchen and cook the omelette myself!’”

McNally said the server was “very apologetic” and arranged for complimentary champagne for James his wife Julia Carey, 43, with whom he shares three children.

But he said the host was so “nasty” to their server for the rest of brunch she was “shaken” for the rest of her shift.

McNally’s post has gone viral and the owner has updated fans that Corden has called to apologise.

“James Corden just called me and apologized profusely. Having f***** up myself more than most people, I strongly believe in second chances. So if James Corden lets me host his Late Late Show for 9 months, I’ll immediately rescind his ban from Balthazar. No, of course not,” he wrote.

“But... anyone magnanimous enough to apologize to a deadbeat layabout like me (and my staff) doesn’t deserve to be banned from anywhere. Especially Balthazar. So Come Back to the 5 & Dime, Jimmy Corden, Jimmy Corden. All is Forgiven. xx”

McNally told Page Six he had been “reluctant” to publicly hit out at James but went ahead “out of loyalty to restaurant servers everywhere”.

He said: “Their jobs are hard enough already. They shouldn’t have to take this kind of abuse from anyone, especially the rich and famous.”

Page Six said James Corden’s representatives had not responded to their request for comment.