HIH Crown Prince Jonathan (2008-2013)
The constitutionally-designated Founder of Austenasia, Crown Prince Jonathan was declared Prime Minister in the Empire's Declaration of Independence on 20 September 2008, and elected to said position on 1 January 2009 and again on 23 December 2011. The Crown Prince's term as Prime Minister - the longest to date - saw the position transition from the executive leader of government to a more advisory role as the powers of the Throne gradually increased. The adoption of the Austenasian Constitution of 2011, championed by the Crown Prince and in force to this day, cemented the executive, legislative, and judicial authority of the Monarch over that of the Prime Minister. During Crown Prince Jonathan's term as Prime Minister, he wrote the vast majority of the Empire's legislation, defended the constitutional government during the Austenasian Civil War, and even after losing most of his actual power to the Throne was able to work behind the scenes to arrange for Declan I to become joint Emperor after misgivings about the sole reign of Esmond III. Represented Austenasia at the 2011 Intermicronational Summit and the 2012 Polination Conference, and acquired several foreign protectorates for the Empire. Upon the abdication of Declan I on 20 January 2013, Crown Prince Jonathan accepted the Throne and so became the incumbent Emperor Jonathan I, automatically losing the office of Prime Minister.
Lord Marshal William Kingsnorth, Baron of Zephyria (2013)
As Deputy Prime Minister, Lord Marshal William became Acting Prime Minister upon the ascension to the Throne of Jonathan I on 20 January 2013. Proposed no new policies and was unable to take on much executive leadership due to the proactive exercise of the powers of the Throne by Jonathan I. Although the Lord Marshal continued to exercise his duties both as Representative of Zephyria and as the holder of several offices in Cabinet, his use of the powers of the position of Prime Minister functioned mostly as a "rubber stamp" for the decisions of the Emperor. Stood in the November 2013 general election to elect a Prime Minister, but withdrew in support of Countess Eritoshi shortly before voting took place.
HIH Eritoshi, Countess of Memphis (2013-2015)
Countess Eritoshi of Memphis, Representative of Thanasia, was elected Prime Minister on 19 November 2013 with 66% of the vote. Eritoshi developed the role of the premiership under Lord Marshal William by functioning as an "enforcer" for the Emperor's policies, using the Prime Ministerial deciding vote and the prestige of her office to have legislation and policies proposed by Jonathan I passed more easily through Parliament. Despite establishing the Green Party of Austenasia to organise her supporters and manifesto, the Countess lost the March 2015 general election to the incumbent Lord Admiral Kennedy.
HIH Lord Admiral Joseph Kennedy, Duke of Bohemia (2015-present)
The incumbent Prime Minister, Lord Admiral Joseph Kennedy, serves as Representative of New Richmond. He was elected on 4 March 2015 with 68.3% of the vote, and re-elected to a landslide victory on 28 February 2019 with 86.84% of the vote. The Lord Admiral has returned the office of Prime Minister to being one of an active head of government, proposing numerous pieces of legislation, overseeing governmental and military reforms, and securing concessions from the Throne such as the pledge to have all Cabinet appointments nominated by the Prime Minister before approval from the Monarch. The Lord Admiral has furthermore established a Prime Minister's Staff, the first in the history of the office, consisting of various advisors from the Empire.