At any regal event, proper behaviour is expected at all times - even when planning how your street party will look, it seems.
An etiquette coach has been handing out some handy tips to avoid a right royal Coronation disaster.
If it's not fit for a King, it just won't do - so if you want to dodge looking 'tacky' in front of your mortified neighbours, there's help at hand.
There are a number of tempting easy-to-buy items that would not impress the King or anyone else for that matter, we are told - and the food has to hit the spot, too.
Products which seem like fun are just a 'waste of time and money' says William Hanson, who has offered his dos and don'ts when it comes to throwing your party and getting the tone right this weekend.
Cardboard cut outs of the royals are an automatic no-no he says - and not just became of the less than perfect weather coming our way.
Royal face masks should also stay in the shops and not been seen on the streets, we've all been warned.
"When it comes to decorations, lifesize cardboard cut-outs of the royals that you can buy on Amazon are tacky and I’m not a fan," he told the Sun.
"You get amusement out of them for about 20 seconds then nobody cares. And avoid face masks with royals’ faces on, they’re also a waste of resources and money.
"People wear them for two minutes and then realise it is really uncomfortable having a piece of paper strapped to their face - they are tacky and pointless."
That's us told!
Also if you're thinking about whacking on the BBQ to impress your neighbours, you should not even consider it, the etiquette expert insists.
Despite the iffy weather, more than nine million are still planning on enjoying a street party this weekend.
How will you be celebrating the Coronation? Vote in our poll HERE to have your say.
A study has found that half of those polled will still be making the iconic Coronation Chicken sandwich to mark the special occasion.
Around 17% Brits are planning to attend a street party to celebrate the King’s Coronation, while the same number are still weighing up their plans for the occasion.
An average of 44 guests was seen as ideal number of people, and the event should last four hours, according to respondents.
Making an effort with decorations such as bunting and balloons and taking into account dietary requirements also ranked highly in the do category.
However, blocking your street without permission was a big no-no.
Other don’ts to avoid on the big day include rowdy behaviour and bringing up a long-running disagreement with a neighbour.
