sovereigns Stanley Baldwin is the only prime minister to have served three sovereigns, in succession: King George V, King Edward VIII, and King George VI. Ten prime ministers served under two sovereigns, nine through being in office at transitions between reigns. Robert Walpole — George I and George II The Duke of Newcastle — George II and George III Lord Liverpool — George III and George IV The Duke of Wellington — George IV and William IV Lord Melbourne — William IV and Queen Victoria Robert Peel — William IV and Queen Victoria (not in office during transition of reign) Lord Salisbury — Queen Victoria and Edward VII H. H. Asquith — Edward VII and George V Winston Churchill — George VI and Elizabeth II Liz Truss — Elizabeth II and Charles III Number of PMs serving during reign Elizabeth II — 15, from Winston Churchill to Liz Truss George III — 14, from the Duke of Newcastle to Lord Liverpool Victoria — 10, from Lord Melbourne to Lord Salisbury George II — 5, from Robert Walpole to the Duke of Newcastle George V — 5, from H. H. Asquith to Stanley Baldwin George IV — 4, from Lord Liverpool to the Duke of Wellington William IV — 4, from the Duke of Wellington to Lord Melbourne Edward VII — 4, from Lord Salisbury to H. H. Asquith George VI — 4, from Stanley Baldwin to Winston Churchill Charles III — 2, Liz Truss and Rishi Sunak George I — 1, Robert Walpole Edward VIII — 1, Stanley Baldwin PMs born during reigns in which they held office Nine prime ministers have served office under sovereigns in whose own reigns they were born. King George III (reigned 1760–1820) Spencer Perceval — born 1762, served 1809–1812 — was assassinated in 1812; his is the only complete lifetime lived by a prime minister under a single sovereign Lord Liverpool — born 1770, served 1812–1827 Queen Victoria (reigned 1837–1901) Lord Rosebery — born 1847, served 1894–1895 Queen Elizabeth II (reigned 1952–2022) Tony Blair — born 1953, served 1997–2007 David Cameron — born 1966, served 2010–2016 Theresa May — born 1956, served 2016–2019 Boris Johnson — born 1964, served 2019–2022 Liz Truss — born 1975, served 2022 Cameron, Johnson, and Truss have the additional distinction of being younger than all of Elizabeth II's children. PMs who lived under most reigns Both Robert Walpole (1676–1745)