Your/Her/His Majesty
From Longman Dictionary of Contemporary EnglishYour/Her/His MajestyYour/Her/His MajestyPGused when talking to or about a king or queen → Your/Her/His Highness The prime minister is here to see you, Your Majesty. His Majesty the King → majestyExamples from the CorpusYour/Her/His Majesty• His Majesty, King Juan Carlos I• How do you like the White House, Your Majesty?