Prince William

Paper: App tracking Prince William flights poses terror risk

The Mail on Sunday said the 2.99 pound ($4.65) app allowed it to keep close track of William as he flew in his capacity as a private pilot with East Anglian Air Ambulance in eastern England.

It said the app allowed its journalists to pinpoint where William was planning to land the air ambulance helicopter.

It published photos appearing to show William's helicopter landing and of the prince himself talking to colleagues on the ground.

Royal guardsmen play "Happy Birthday" to Prince George

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."