Prime Minister of Thailand largest political party in the lower house or the leader of the largest coalition of parties. In accordance with the constitution, the prime minister can only be appointed twice and is therefore limited to a maximum of two consecutive terms. The post of Prime Minister is currently held by Retired General Prayut Chan-o-cha, since the coup d'état on 22 May 2014. The office of the "President of the People's Committee" (), later changed to "Prime Minister of Siam" (), was first created in the Temporary Constitution of 1932. The office was modeled after the Prime Minister of the United Kingdom,
Prime minister-designate leader of the largest opposition party therefore could still become prime minister-designate perhaps several weeks after the general election. The term prime minister-elect is sometimes used as a synonym, but in most circumstances it is technically incorrect: a prime minister is usually appointed by the head of state, and not elected to office by the entire nation, as is the case with some presidential polls. However, it has nonetheless seen common use in the media. Terms such as incoming prime minister and prime minister-in-waiting are also sometimes used, although the latter term is also sometimes used prior to an election