Right: Prince Harry holds Archie with Duchess Meghan. Harry attended an event to kick off the one-year countdown to the 2020 Invictus Games in The Hague, Netherlands - the annual sporting event he founded in 2014, in which wounded veterans compete - but made it clear he was still thinking about his newborn son.
The Duke was presented with a toy rattle by one, and Princess Margriet gave him a baby grow to take back to the UK.
The royal couple announced their child's name on Instagram for the first time, with a heartwarming family photo of Meghan, Harry featuring the Queen and her husband Prince Philip and Meghan's mother, Doria Ragland.
Harry had originally planned to visit the country on Wednesday for two days, but shortened it to a day-trip last week, fueling fevered speculation about the baby's birth.
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He added that the " United States wants to colonize the Latin America and the Caribbean region, using the Monroe Doctrine".
The Duchess' real name, Rachel, is a close acronym to Archie and royal fans were quick to pinpoint the reference.
"He said [Archie] slept for the first 24 hours like all babies do... and then he woke up", JJ said, mentioning that he could clearly see how happy the Duke of Sussex was. Their third child Prince Louis' birth certificate, for example, reads his full title as His Royal Highness Prince Louis Arthur Charles of Cambridge. They elected to spend the first two days as new parents away from the media spotlight before presenting him to the public at Windsor Castle on Wednesday 8 May.
Meghan, meanwhile, said their son has the "sweetest temperament". "So I'm really happy", she gushed. "But his looks are changing every single day, so who knows".