So when the still unnamed baby was born, the two were quick to share a heartfelt message meant to celebrate the joyous birth and welcome their nephew to the world and the royal family.
Meghan Markle's estranged father wished the couple well after the birth of their baby boy on Monday.
"We couldn't be more delighted at the news and we're looking forward to meeting the baby when we return", Prince Charles, the baby's grandfather and heir-to-the-throne, said to well-wishers while on a trip to Berlin. Their Royal Highnesses' son weighs 7lbs.
"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".
"It may well be that they (Harry and Meghan) decide not".
Alongside the Duke was wife Kate, who also congratulated Prince Harry and Meghan on the birth of their son.
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Harry said it was an "amazing" experience to witness the duchess give birth. Before he married Meghan past year, Harry spoke about his desire to pay tribute to his mother's memory during the wedding ceremony.
The general public will get their chance to see the Royal Baby this week after the new family has had time to adjust.
"It is possible that Harry might want his child not to have the burden of a royal title but I think the rest of the world would like the child to have (one)", said Ingrid Seward, editor of "Majesty" magazine.
Writing on her lifestyle blog, Meghan told how her "free-spirited clinical therapist" mother took her to visit the slums of Jamaica and to see poverty in Mexico when she was just 10.
The birth produced a moment of high drama likely to be replayed for the rest of Harry's life.
Priyanka Chopra and Meghan Markle have been friends since 2016 - at the time, both were starring in hit American TV shows - and they featured on each other's social media posts frequently (Meghan Markle's Instagram account was deleted ahead of the royal wedding).
He said: "I'm very excited to announce that Meghan and myself had a baby boy this morning, a very healthy baby boy".