The princes who were asked to help with the machine after the Queen was baffled by the technology, recorded the message "Hey wassup! This is Liz. Sorry I'm away from the throne. For a hotline to Philip, press one. For Charles, press two. And for the corgis, press three."
Britain's Sky News reported that the Queen was very upset at first but later saw the humor in the prank while thinking about who may have heard the message.
But, Queen Elizabeth's private secretary was not amused, said the Daily Star, adding that he almost fell out of his chair when he heard the message.
Notable deaths of 2014 [PHOTOS]