Who gets to pick the PM?
The head of the biggest party may not necessarily lead Thailand, or even form a government, because the country’s electoral system is heavily weighted in favor of the conservative establishment.
Parties winning more than 25 seats can nominate their candidate for prime minister. Those candidates will be put to a vote, with the whole 750-seat bicameral legislature voting.
To be prime minister, a candidate must have a majority in both houses – or at least 375 votes.
However, the 250-seat member Senate is likely to play a key role in deciding the next government of Thailand and, because it is chosen entirely by the military, it will likely vote for a pro-military party.
That means an opposition party or coalition need almost three times as many votes in the lower house as a military party to be able to elect the next leader.
Observers say that early results would be expected at midnight in Bangkok – but it could be weeks or even months until Thailand sees a new prime minister.