Alongside the article, Kirstie simply typed: “No,” in view of her 423,000 followers.
Quickly the star received a flurry of responses, as fellow tweeters weighed in on the subject.
One said: “I don’t understand this – prince/princess titles were curtailed years before Archie was born. Basic research would tell Oprah that. Prince Edward, also a male prince, has two children without royal titles.”
READ MORE: Piers Morgan infuriates critics over latest Meghan and Harry post
While a third replied: “How do you know?”
In a previous tweet by Kirstie, she explained how Archie does have a tittle, albeit not prince, and is known formally as the Earl of Dumbarton.
She wrote: “Archie is the Earl of Dumbarton, but his parents chose not to use that title.
She typed back: “In the clip from the interview, the whole of which I have not seen, it seemed as if the two were linked. I’m just saying it’s likely that that is not the case.
“I do not deny for a single second Meghan has been targeted by racists, but within Harry’s family too?”
Meanwhile, Anita Singh, arts and entertainment editor, questioned if Kirstie meant racism does not happen amongst the upper classes.