The Prime Minister of the Hellenic Republic (, Pro_thypourgós ti_s Elli_nikí_s Di_mokratías), colloquially referred to as the Prime Minister of Greece (, Pro_thypourgós ti_s Elládas), is the head of government of the Hellenic Republic and the leader of the Greek cabinet. The incumbent prime minister is Alexis Tsipras, who took office on 21 September 2015.