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 Commons MP, when known as Lord John Russell (as younger son of a Duke of Bedford) in 1846–52, and his second and last entirely as a member of the Lords as the 1st Earl Russell in 1865–66, having been raised to the peerage between terms in 1861. Without counting Lord Russell, eighteen Prime Ministers served their entire terms from the House of Lords where they were already members, chronologically: <nowiki>*</nowiki> These five Prime Ministers never served in the House of Commons during their political careers. Three Prime Ministers were elevated from the Commons to the House of Lords during their