05/04/2015 10:11 EDT | Updated 05/04/2016 05:12 EDT

Charlotte Elizabeth Diana is name of new royal baby

Prince William and the Duchess of Cambridge have named their newborn daughter Charlotte Elizabeth Diana, Kensington Palace has announced.

The princess is the couple's second child. She is the fifth great-grandchild of Queen Elizabeth II and the fourth in line to the throne, after her grandfather Charles, her father William and her older brother George.

William and Kate introduced the baby princess Saturday evening to the world, just 12 hours after Kate checked into London's St. Mary's Hospital to give birth. The baby weighed in at eight pounds, three ounces (3.7 kilograms).