Inside King Charles, Queen Camilla's first US state visit

King Charles and Queen Camilla are preparing for their first state visit to the United States later this month.

Ahead of their visit, etiquette expert William Hanson spoke with People about how the occasion will be different from the formal affairs the royal couple is used to at Windsor Castle.

William said, "State entertaining is not particularly innovative. There’s a belief we did it once like this and it worked, so why change it?"

Referring to the White House state dinner on April 28, William said it "“will follow the tradition of all other American state entertaining. So, it won’t be white tie, but black tie."

"The last time the Americans did white tie was when President George W. Bush entertained the Queen and Duke of Edinburgh. It will be more casual. It will be very formal for most people but more casual than a British one," he added referring to Queen Elizabeth and Prince Philip's 2007 state visit to the US.

Furthermore, the expert noted there will be "more celebrities" and the dinner will be served to guests seating around "round tables as opposed to one long table like at Windsor. It will look and feel a bit different."

It is pertinent to mention that King Charles' and Queen Camilla's state visit to the US "will celebrate the historic connections and the modern bilateral relationship between the United Kingdom and the United States, marking the 250th anniversary of American Independence," as stated by Donald Trump in the statement.

William notes, "The point of the state visit is to forge relations, and the King is very personable and is a good conversationalist and has a good sense of humor."

"He is an interesting person to speak to — not that his mother wasn’t. But the King is arguably more relaxed and is a people person and is interested in other people, which you have to be in order to do his job," he added to the outlet.