The grand master of the Order of St Michael and St George is the second most senior officer of the
Order of St Michael and St George. The grand master is appointed by the
British monarch as Sovereign of the Order of St Michael and St George and ranks immediately after the Sovereign.
1904–1910:
The Prince of Wales (Sovereign: King Edward VII) – In 1910, the Prince of Wales ceased to be Grand Master when he acceded the throne as King George V and became Sovereign himself
1910–1917: (vacant) (Sovereign: King George V)
1917–1936:
The Prince of Wales (Sovereign: King George V) – In 1936, the Prince of Wales ceased to be Grand Master when he acceded the throne as King Edward VIII and became Sovereign himself
1936–1957:
The Earl of Athlone (Sovereigns: King Edward VIII, King George VI, Queen Elizabeth II)