On Wednesday morning, the royal guardsmen delivered an impromptu performance that would make any birthday boy happy.
"Thank you to the Grenadier Guards for playing ‘Happy Birthday' at today's Guard Change!" Kensington Palace shared on Twitter with video from the show. "#HappyBirthdayPrinceGeorge." Wonder if he was able to listen in from his play room?
Earlier this week, a palace spokesperson told E! News that "the family will be spending the day privately."