The occasion was made all the more tender when the new father endeared himself to the nation by calling his wife "poppet" as he ushered her back inside the Lindo Wing having spoken to the press.
The Duke of Cambridge, clearly overjoyed to be holding their little boy Prince George in his arms, tenderly put his hand on his wife's back and affectionately addressed her using the adorable moniker.
Seeing the new trio get into the car together to drive off and begin family life was a heart-warming event that will be etched on our memories for generations to come.
HELLO! Online has compiled a list of nicknames of members of the royal family...
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1. While Kate was pregnant, she and husband William are said to have called their unborn baby 'our little grape'.
2. The new mum was nicknamed 'Squeak' while as a young girl at St Andrew's School in Berkshire. She explained how the name came about while on a visit to the school years later. "I was nicknamed Squeak just like my guinea pig," she said. "There was one called Pip and one called Squeak because my sister was called Pippa and I was Squeak."
3. Popular at school, Kate was allegedly known as the 'Princess-in-waiting' by her fellow Marlborough College pupils.
4. Prince Harry revealed that Diana used to call William 'Wombat'. The Duke revealed the origins of the moniker in an interview. "It began when I was two. I've been rightfully told because I can't remember back that far," he explained. "But when we went to Australia with our parents, and the wombat, you know, that's the local animal."
5. While studying Geography at the University of St Andrews in Scotland, William was known as 'Steve' to keep a low profile and avoid any unwanted attention.
6. William's official name is His Royal Highness Prince William Arthur Philip Louis but he is affectionately known as 'Wills' to friends and the public.
7. Prince Harry's friends refer to him as 'Spike'. The young royal had a Facebook account that used the pseudonym 'Spike Wells' for four years until it was shut down because it posed a "security risk".
8. Born Catherine Elizabeth Middleton, the Duchess is widely known as Kate. "Miss Middleton uses both names equally, and she has never expressed a preference for either Catherine or Kate since her engagement to Prince William," the royal wedding official website said prior to her becoming William's wife. "Catherine is the name that Miss Middleton grew up with in her family, and Kate is the name that she tends to use in a work context".
9. As a little girl, the Queen referred to herself as 'Tillabet'. As she grew up, she became known as 'Lilibet' among her family and close friends – apparently some of them still use the affectionate nickname for the monarch.
10. The Duke of Edinburgh's pet name for his wife came to light after the 2006 film The Queen was released. In a bedtime scene at Balmoral, Philip says to Her Majesty, played by Dame Helen Mirren, "Move over, Cabbage."