The Queen's Guard surprised tourists outside London's Buckingham Palace by busting out the "Game of Thrones" theme song.

Queen Elizabeth II declined the opportunity to take her rightful seat on the Iron Throne of Westeros last month, but apparently that doesn't mean she's above having the hit HBO series' theme song played from time to time.

There have been many reinterpretations and renditions of the title track, but this one is by far the most regal yet.

Watch the video below or by clicking here: