The finishing part sounded even vaguer: "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", which led some to think that the baby had already arrived.
The duchess is expected to follow in the footsteps of Queen Elizabeth II herself, by giving birth to her baby at home - and she has reportedly hired a doula, or birth companion, to help her through the process.
Mr Johnson also said he "doesn't recognise" the Meghan staff at Kensington Palace call "duchess difficult", and instead insisted she is a "really wonderful person".
The news has received a mixed reaction from the public, with many royal fans pleased with the couple's decision to enjoy private time with their newborn, before announcing the birth. Their account broke a world record, gaining one million followers in less than six hours.
Providing information in this way allows them to give a glimpse into their personal lives, while calling the shots on what they do and don't share. "And if I am lucky enough to have children, they can have one too".
"I believe that there is a jealous streak in Meg, she does like to be the center of attention and I feel like that is what is going on now", Samantha said.
The baby countdown is officially on, and we'll be anxiously awaiting news from the palace that Meghan is in labor.
He says he used Doria, now 62, as a role-model when raising his own children.
Other claims regarding Prince Harry and Meghan's first child were made in the documentary, including that the Duchess of Sussex's estranged father is unlikely to ever meet his grandchild due to his tumultuous relationship with the royal couple. And the world is watching.