If you happen to run into the royal couple on their 48-hour pit-stop in Los Angeles, please refrain from saying, "Hey dudes, what's up?!"
Instead, there is proper terminology that you may have missed during that "Royals 101" course you took years ago.
So whether shaking their manicured hands at a polo match (save the high-fives for your less royal pals) or shouting at them from behind a barricade on the street, how should you address the royal couple?
"He should be referred to simply as 'Sir' and she 'Ma'am,' which, properly enunciated, should sound like 'Mum,' " explains our British royals source.
So, say you find yourself face-to-face with the svelte newlyweds, what should you do?
"A tip to ordinary people would be to add Sir or Ma'am, for example, 'Are you enjoying your trip, Sir?' " explains our royal tour insider. "In Canada, people were constantly yelling out questions, and they don't mind too much."
But just be careful not to ask any stupid questions of the educated couple, because if you do they may immediately ice you out.
"They won't always respond and, if they think it's a dumb question, they'll simply 'blank' you," explains our insider. "On other occasions, they might be discreetly ushered away by aides or, in rare cases, members of the Royal Protection Squad, the specially trained Scotland Yard 'minders.'"
In other words, don't do anything idiotic. There will be major consequences.
But don't get too scared if you flub a "hello" either, because remember, Wills and Kate are human too!
"Don't forget; this is Kate's introduction to the royal way of life," explains our palace source. "You might not know it from her facial expressions, but I'd bet she, in some cases, is just as nervous as the well-wishers who shout stuff at her."
So grab that megaphone and head to the Wallace Neff house in Hancock Park, kids. Which leads us to our next question…
Why are the Royal newlyweds staying at a home in Hancock Park as opposed to say, a luxurious bungalow at The Beverly Hills Hotel?
"They tend always to stay in the homes of British Government representatives around the world," explains our royals insider. "Be those abodes ever so humble compared with their palaces!"
The newly renovated Hancock Park home ain't that bad, just not the palatial digs the Duke and Duchess are accustomed to.
But the Neff home, which was built in 1928, has belonged to the Brits since 1957 and is, according to the consulate's website, used "for the purpose of enriching and developing the multifarious connections between Britain and Los Angeles in business, politics, education, culture, science and many other fields of endeavour."
Aside from all of the official British rules, regs and mumbo jumbo, at least the home has a pool.
Cannonball contest, anyone?