08/21/2013 at 04:00 PM EDT
He's only been at this royal baby thing for a little more than a month, but Prince George has already mastered the job's two main duties: (1) getting bigger; and (2) thoroughly exhausting his parents.
"He's growing quite quickly actually," Prince William
told CNN on Aug. 19 of his son. "He wriggles around quite a lot, and he doesn't want to go to sleep that much."
While the future king – a "little bit of a rascal ... he either reminds me of my brother or me," as William said – continues to exert his newborn authority, his mom and dad are working their way through a to-do list that includes settling on godparents, packing up their first home in Anglesey, Wales, and scheduling their first joint engagement since welcoming George on July 22.