Hatrick has always been a royal fan - he remembers his mother looking for somewhere to watch Prince Charles marry Diana Spencer while on holiday in a remote seaside cottage in 1981 and avidly read about Tudor monarchs as a teenager. ET recently confirmed that the pair moved into their home at Frogmore Cottage and are eager to welcome their little one.
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. And on behalf of The Duke and Duchess (and Baby Sussex), we thank you so much", the message continued before concluding with, "You made this happen.
"Their Royal Highnesses have taken a personal decision to keep the plans around the arrival of their baby private", it added.
"The Duke and Duchess look forward to sharing the exciting news with everyone once they have had an opportunity to celebrate privately as a new family".
He told Express.co.uk: "There's the goldfish bowl effect created by social media".
While there isn't an official rule, so far as we know - Twitter didn't exist when most of this was figured out - none of the other Royals have public accounts.
"She's Granny, and Granny has a very specific role, a very nurturing and loving role". She and Prince Harry want the nanny to feel like part of their family instead of an employee.
"She'll want to feel like she can be more independent, so I think that's what they're asking for more privacy - undoubtedly".
Though there have been suggestions the grandma-to-be will essentially provide full-time support to the new royal baby, Victoria Arbiter doesn't believe this will be the case.
While an early 20th century decree by King George V declared that only the eldest son of the Prince of Wales was entitled to hold the title of HRH, Queen Elizabeth issued a new Letters Patent.
Will Meghan Markle's baby have a title, and what will he or she be called?
When Harry and Meghan, who are expecting their first child, launched their @sussexroyal Instagram handle on April 2, the account broke the record for the fastest time to get one million followers on the platform, hitting the number in five hours and 45 minutes, according to Guinness World Records.