Prince William and Kate Middleton announce newborn son's name

Prince William and Kate Middleton have revealed the name of their newborn baby boy.

On Friday, April 27, 2018, Kensington Palace shared that William and Middleton's son's name is Louis Arthur Charles. In a statement on Twitter, Kensington Palace wrote, "The Duke and Duchess of Cambridge are delighted to announce that they have named their son Louis Arthur Charles," adding, "The baby will be known as His Royal Highness Prince Louis of Cambridge."

According to royal historian Marlene Koenig, the child's full title, however, will be His Royal Highness Prince of the United Kingdom of Great Britain and Northern Ireland (via Town & Country).

E! News notes that no British monarch has ever boasted the name Louis, though it's a popular name for French royalty. However, it's not uncommon for Louis to be used as a middle name for the British royal family, as evidenced by the kiddo's father and older brother. William's full name is William Arthur Philip Louis, while his firstborn's full name is George Alexander Louis.

As Nicki Swift previously reported, William and Middleton welcomed their third child into the world on Monday, April 23, 2018. The baby weighed 8 pounds, 7 ounces. William and Middleton are also parents to 4-year-old Prince George and 2-year-old Princess Charlotte.