Boris Johnson has called on those worrying about the Olympics to "put a sock in it", stop complaining and get behind Team GB for the Games.
Writing in The Sun newspaper, the Mayor of London implored the naysayers to look at the positive impact the Olympics are bringing to the city, rather than being gripped in a "paralysing stage fright".
Boris wrote: "We've got an advanced case of Olympo-funk. We agonise about the traffic, when our transport systems are performing well and the world's athletes are arriving on time.
"We worry about security when we always planned to have a strong military role in making our games as safe as possible.
"We are nervous about our Olympic accommodation - when our Stratford village is already being showered with foreign praise.
"We gnaw our fingernails about the blinking weather, when it seems to be brightening up a bit - and anyway, it's England in July for goodness sake and a spot of rain never hurt anyone."
Ordering people to "cut out the whining", Johnson pointed to the fantastic Olympic Park, which he said was built on time and under budget, calling it a "great global calling card for British construction and engineering".
He also highlighted the free cultural events that will run alongside the Games, and the platform for future prosperity the event has brought, such as improved rail links.
"On every side they will see proof London is also the cultural capital of the world. I’m not just talking about a few fire-eaters, or chaps painted silver making jerky movements," he said. "The bridges on the river will be lit up with state of the art displays."
But he did mention one slight worry. "Can we do as well as last time?" he asked. "Can we beat France? Can we beat Australia? Of course we can.
"And if we get it right, we can make the Olympics a big win for jobs and growth as well - so let's get behind our team and the Games."
Yesterday it was announced that a further 1,200 troops were put on standby to provide Olympics security as the fallout from private security firm G4S' failure to provide enough staff continued.
Theresa May has been accused of giving MPs a "selective account" about when she knew G4S were having problems supplying enough guards to secure the Olympics.
The home secretary admitted the government and organisers Locog knew there were problems and that the firm, the world's second largest private sector employer, could fail to meet its contract as early as June 27.
Shadow home secretary Yvette Cooper said: "The Home Secretary was asked repeatedly when she and the Home Office were warned about problems at G4S, and she repeatedly gave everyone the impression they had only known since July 11.
"Why has Theresa May waited until now to admit the Home Office in fact were warned two weeks earlier?
"She needs to explain urgently how she justifies having given Parliament and the public such a selective account, and why the Home Office were so slow to respond."
The details were revealed by May in a letter to the Commons Home Affairs Select Committee.
Lord Coe, the chairman of LOCOG, has insisted there were no concerns over security.
He told BBC Radio 4's Today programme: "It is very important to keep this in perspective. There are 4,000 people from G4S who have been working very successfully currently on the park and have been working successfully for many years on this.
"This is not an issue that has remotely compromised security. This was actually about the supply and the mix, its never been about the numbers.
"We have got the numbers, courtesy of the military and our police services, we have got the numbers to make sure that this is a a safe and secure Games."
He added: "As soon as we found that there was fragility in G4S's ability to get those bodies on to those jobs that they had been rostered for we acted very quickly."