Records of Prime Ministers of the United Kingdom transitions between reigns, eight Prime Ministers each served under two sovereigns: George III had 14 Prime Ministers serving during his 59-year reign (reigned 1760–1820), beginning with the Duke of Newcastle. The last incumbent, Lord Liverpool, was the only one appointed by his son (the Prince Regent) during the father's final incapacity to rule. In downward numerical order, numbers of Prime Ministers in office during other reigns are: Only six Prime Ministers came to serve office under sovereigns in whose own reigns they were born. The present Prime Minister, Theresa May, is the third Prime Minister to have been born in
Records of Prime Ministers of the United Kingdom Irish Scottish Welsh Others Two other Prime Ministers are known to have had Jewish ancestors: Britain's Prime Ministers have been predominately Anglican by denomination, in an office which has had input into the appointment of that Church's bishops. The first to hold the office from outside the English established church was Lord Bute, who was a member of the Scottish Episcopal Church, while the Duke of Grafton was the first to convert away by formally becoming a Unitarian, after leaving office. Tony Blair is the only British Prime Minister to become a Roman Catholic, albeit he converted after leaving office.