Truss hence became the first prime minister since Winston Churchill to serve under a monarch other than Elizabeth II. In this, Truss also became the last of fifteen people to serve as Prime Minister of the United Kingdom under Queen Elizabeth II, after Winston Churchill, Anthony Eden, Harold Macmillan, Alec Douglas-Home, Harold Wilson, Edward Heath, James Callaghan, Margaret Thatcher, John Major, Tony Blair, Gordon Brown, David Cameron, Theresa May, and Boris Johnson.