Their latest post is a personal "thank you" to well-wishers who have made donations to four charities, in lieu of gifts for the couple's forthcoming baby.
On the documentary, Juliet Angus, a fashion and lifestyle blogger, added: "They're cooking royal babies here".
Since the Duchess and Duke of Sussex have only announced that their first child is due sometime in the spring of 2019, royal baby watchers have tried to piece together that the former "Suits" actress will deliver sometime in April early May.
But now, over a year later Meghan Markle may be back on the 'gram!
And how mums-to-be don't want Meghan to give birth at Frimley Park Hospital as they fear she'll nab the best suite.
While there have been many opinions about why Meghan has made a decision to opt out of a photocall moment, royal commentator Omid Scobie says that one of the reasons might be because she is "quite nervous" about the birth. American families just need to follow royal news and wait for the Duchess of Sussex to give birth.
Meghan is now thought to be nesting at the couple's new home, Frogmore Cottage in Windsor, in the last few weeks of her pregnancy.
Additionally, the same post referenced both American and British currency, writing, "Whether a $5 donation, £1000 contribution, offering to volunteer, or spreading the word - you've played your part".
According to Entertainment Tonight, the first clue to Baby Sussex's gender came during Markle's baby shower in New York City.
The first post even featured a message signed off specifically by Meghan and Prince Harry.
"YOU chose to be part of the collective good, and you have made a real difference", the post reads. The page once again wrote of Baby2Baby, writing that it was able to disperse "diapers" to over 5,000 children in need, but in the United Kingdom diapers are referred to as "nappies".
Though Meghan's baby will be born of royal blood, that does not necessarily mean that he or she will be dubbed a prince or princess.
He is said to be a devoted grandfather, and it seems likely he will be the same for his youngest son Harry's child, particularly due to his close relationship with Meghan Markle.