PEOPLE Prince Louis!

And then they were five! On April 23, 2018, Prince William and Kate Middleton added another son to their family: Prince Louis Arthur Charles of Cambridge. A new baby is always a cause of great joy, but a new little Windsor is a cause for celebration for royal-watchers around the world.People's new Commemorative Edition, William, Kate & Family Welcome Prince Louis, is filled to the bonnet with the latest royal fare, presenting baby Louis's first pictures with his parents, and the most adorable moments in the young lives of his brother and sister. This inside look at the rarefied, yet shockingly regular world of Prince George and Princess Charlotte shows what it's really like 'growing up royal.' Plus: The special bonds between royal siblings, from Queen Elizabeth and her sister, to William and Harry. And, of course, we include dozens and dozens of adorable pictures featuring the royal youngsters that are sure to melt your heart!