Admiral of the Fleet Albert Victor Nicholas Louis Francis Mountbatten, 1st Earl Mountbatten of Burma was a British statesman, naval officer, colonial administrator and close relative of the British royal family. He was born in the United Kingdom to the prominent Battenberg family. He was a maternal uncle of Prince Philip, Duke of Edinburgh, and a second cousin of King George VI. He joined the Royal Navy during the First World War and was appointed Supreme Allied Commander, South East Asia Command, in the Second World War. He later served as the last Viceroy of India and briefly as the first Governor-General of the Dominion of India.

Admiral of the Fleet is a five-star naval officer rank and the highest rank of the Royal Navy, formally established in 1688. The five-star NATO rank code is OF-10, equivalent to a field marshal in the British Army or a Marshal of the Royal Air Force. Apart from honorary appointments, no new admirals of the fleet have been named since 1995, and no honorary appointments have been made since 2014.