A list of royal babies without this little British prince would be irrelevant.
The three-year-old prince has been growing up before our very eyes and will be attending a new prep school in London at the start of September.
We've seen him on royal tours with his parents and younger sister and he's been charming everyone from Barack Obama to Justin Trudeau.
It's hard not to love this cheeky tot.
The soon-to-be two-year-old is fourth in line to succeed her lookalike, Queen Elizabeth II.
We've already seen so much attitude from Prince William's only daughter.
Her mother has already revealed that she's "the boss of the house" despite being the youngest in the family.
She might be cute, but the Duchess of Cambridge tells People, "She has got quite a feisty side!"
Prince Jigme of Bhutan
The Kingdom of Bhutan, its King Jigme Singye and his wife Queen Jetsun Pema were beyond thrilled to welcome the latest addition to their royal family.
Prince Jigme Namgyel Wangchuk arrived on February 5, 2016, and has since made many adorable public appearances.
The little prince is also said to be a carbon copy of his dad.
Prince Nicolas of Sweden
Like her elder sister, Princess Madeleine of Sweden has two children: Princess Leonore and Prince Nicolas.
The younger child was born just five days after his mother's 34th birthday.
The one-year-old has already shown his support for the country's women's football team, with her mother sharing a photo of her son sporting the national colors.
Will this prince become the next Swedish representative at the Olympics? We'd like to think so.