But they will both be entitled to HRH styles when Charles becomes king because they will have moved up the line of succession to become the children of a son of a monarch.
However the complex rule, which dates back to George V, has previously sparked huge controversy.
Prince Harry and Meghan’s newborn baby daughter will not instantly become a princess – but will be entitled to be one when the Queen dies
Make like Meghan in a printed maxi dress by La Ligne
The Duke and Duchess of Sussex are awaiting the arrival of a new addition to their adorable family.
They released this beautiful photo shot by Misan Harriman after revealing little Archie’s new sibling will be a girl. In it we can see a joyful Meghan with her bump in full view.
If you’re anything like us, your eyes were instantly drawn to Meghan’s dress. It’s by La Ligne and is called the ‘Pyper’ dress, named after La Ligne muse Pyper America.
This flowing maxi is 100% silk and features a palm and floral print atop a smocked bodice and tiered silhouette. It has since sold out, but click (right) to get a closer look at the dress on Orchard Mile.
Then peruse our carousel for similar sage green picks from the high-street and high-end! We’re adding the Faithfull The Brand offering to our virtual basket as we type…
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Under the George V rules, Archie would still be entitled to be an HRH or a prince when his grandfather Charles, the Prince of Wales, accedes to the throne
There was mass confusion when Meghan suggested that the Royal Family allegedly stripped Archie of his prince title before he was born in her bombshell Oprah Winfrey interview.
The Duchess had said she felt from the start of her first pregnancy that the rules were being unfairly and inexplicably changed for him.
She told the talk show host: ‘In those months when I was pregnant, all around this same time, so we have in tandem the conversation of, “you won’t be given security, not gonna be given a title” and also concerns and conversations about how dark his skin might be when he’s born.’
However the suggestion Archie had lost his title was not questioned, with Oprah instead focusing on the more shocking allegation about Archie’s skin colour.
Since the interview royal experts have hit down the claim against palace officials, citing a rule from 1917 as the reason why Archie – and now Lilibet – are not yet HRH.
There was mass confusion when Meghan suggested that the Royal Family allegedly stripped Archie of his prince title before he was born in her bombshell Oprah Winfrey interview
In letters patents signed by King George V – the Queen’s grandfather – only royal offspring who are in the direct line of succession can be made a prince or princess and receive titles of His or Her Royal Highness (HRH).
The Letters Patent read: ‘…the grandchildren of the sons of any such sovereign in the direct male line (save only the eldest living son of the eldest son of the Prince of Wales) shall have and enjoy in all occasions the style and title enjoyed by the children of dukes of these our realms.’
Under the rules, only Prince William and the Duchess of Cambridge’s eldest son Prince George – as a great-grandson of the monarch down the direct line of succession to the throne – was originally entitled to be a prince.
The Queen stepped in ahead of George’s birth in 2013 to issue a Letters Patent to ensure all George’s siblings – as the children of future monarch William – would have fitting titles.
Under the George V rules, Archie would still be entitled to be an HRH or a prince when his grandfather Charles, the Prince of Wales, accedes to the throne.
How the order of succession now looks: Lilibet will take the 8th spot on the line, overtaking Prince Andrew, Prince Beatrice and Princess Eugenie (order of succession pictured)
Meghan said Archie becoming a Prince was neither her nor Harry’s ‘decision to make’ and described her ‘pain’ that palace officials said Archie ‘wasn’t going to receive security’ or a title.
When asked if it was ‘important’ for Meghan that Archie be called a prince, she said she doesn’t have any attachment to the ‘grandeur’ of official titles.
But she said it was about ‘the idea of our son not being safe, and also the idea of the first member of colour in this family not being titled in the same way that other grandchildren would be.’
Lilibet is eighth in line to the throne, coming after Archie, and their places are not threatened by their parents stepping down as senior working royals
The new baby is also a first cousin of Prince George, Princess Charlotte and Prince Louis and a fifth grandchild for Charles, but will grow up across the Atlantic, thousands of miles away from the royal family.
The couple confirmed during their Oprah Winfrey interview in March that they were expecting a girl.
A delighted Prince Harry indicated that they planned no further children, saying: ‘A girl, you know, what more can you ask for?
‘But now we’ve got our family. We’ve got the four of us and our two dogs and it’s great.’
He said they would be ‘done’ with two children and the Duchess agreed, adding: ‘Two is it.’