The prince seemed in awe of his wife, Meghan Markle, as he addressed reporters about his newborn son.
"I can't possibly imagine how any woman does what they do, what they do is beyond comprehension, but we are both absolutely thrilled and so grateful for all the love and support from everybody out there," Harry said.
Harry added that they're still considering names.
"I'm so incredibly proud of my wife and as every father and parent would ever say, your baby is absolutely amazing, but this little thing is absolutely to die for so I'm just over the moon," Harry said.
The couple broke the news on Instagram, sharing an image reading, "It's a boy!"
But there was also a nod to royal history, with the traditional easel announcing the birth of a royal baby set up outside Buckingham Palace.
Born around 5:30 a.m. May 6, the baby was a week overdue.
Meghan and Harry will take a couple days to spend with their baby before revealing their new family to the world.