Confiding he had scraped a “few hours” of sleep, he steadied himself for the formalities, relaying carefully: “I’m very excited to announce that Meghan and myself had a baby boy earlier this morning, a very healthy boy.
“Mother and baby are doing incredibly well.”
After that, the emotion so many associate with his late mother poured forth.
“It’s been the most amazing experience I could ever have possibly imagined,” he said.
“How any woman does what they do is beyond comprehension, but we’re both absolutely thrilled and so grateful to all the love and support from everybody out there. It’s been amazing, so we just wanted to share this with everybody.”
Asked whether they had settled on a name, he disclosed they were “still thinking” about it, despite the extra time they had been bought by the “little bit overdue” baby boy.
Next, he promised, would be a photocall for the family of three on Wednesday “to share it with you guys and so everyone can see the baby”.
Asked what it was like to be present for the birth, he laughed and said: “I haven’t been at many births. This is definitely my first birth. It was amazing, absolutely incredible, and, as I said, I’m so incredibly proud of my wife.
“As every father and parent will ever say, you know, your baby is absolutely amazing, but this little thing is absolutely to-die-for, so I’m just over the moon.”
Dressed casually, and standing in front of the stables at Windsor Castle, the Duke thanked the press for their interest before turning, slightly dazed, and thanking two horses for behaving themselves during the broadcast.
The Duke and Duchess will now settle in to life as parents with the help of Ms Ragland, before the new father flies off for a day-long engagement to launch the Invictus Games at the Hague on Thursday.
In a second Instagram post of the day, the couple said: “Their Royal Highnesses thank you for your support and kindness during this exceptionally joyful time in their lives as they welcome their baby boy.”
The congratulations came thick and fast from the Royal Family, fans around the world and the Duchess’s celebrity friends.