Cabinet Secretary (United Kingdom)

Cabinet Secretary
Royal Arms as used by His Majesty's Government
Incumbent Dame Antonia Romeo since 19 February 2026
Cabinet Office
Reports to	Prime Minister Chancellor of the Duchy of Lancaster
Appointer	Prime Minister
Term length	At His Majesty's pleasure
Inaugural holder	Sir Maurice Hankey
Formation	1916

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The cabinet secretary is the most senior civil servant in the United Kingdom and is based in the Cabinet Office. The person in this role acts as the senior policy adviser to the prime minister and Cabinet, and as the secretary to the Cabinet is responsible to all ministers for the efficient running of government. The role is currently occupied by Dame Antonia Romeo.