(Photo credit: Stefan Rousseau/PA/AP Photo)

It's official. Prince William and Kate Middleton have registered the birth of their son, His Royal Highness Prince George Alexander Louis of Cambridge.

"The Duke and Duchess of Cambridge have formally registered the birth of Prince George," Kensington Palace said today. "The Duke of Cambridge signed the birth register at Kensington Palace this morning, witnessed by a Registrar from Westminster Register Office."

William and Kate's occupations are listed on the document as Prince of the United Kingdom and Princess of the United Kingdom, respectively.

Prince George was born July 22 at 4:24 p.m. London time. He weighed 8 pounds, 6 ounces, according to an official announcement from Kensington Palace four hours after the birth.

(Photo credit: Lefteris Pitarakis/AP Photo)

The world got its first glimpse of the little prince the next day when the family departed from St. Mary's Hospital's Lindo Wing. The day-old baby was in his mother's arms swaddled in a white blanket and poked his hand out, as if to greet the world.

"It's very emotional," Kate said. "It's such a special time. I think any parent will know what this feeling feels like."