The results of the June 7 vote mean that Turkey is bracing for a coalition for the first time since the ruling Islamic-rooted Justice and Development Party (AKP) came to power in 2002.
The opening of the single-chamber parliament, the Grand National Assembly of Turkey, is a largely ceremonial affair, with each of the 550 deputies individually swearing oath in a marathon event starting at midday GMT that risks dragging on into the early hours of the morning.
It also starts the process to elect the new parliament speaker, with parties set to propose their candidates in the next five days.
While the AKP emerged as the largest party, the results were a blow not only to its authority but also President Recep Tayyip Erdogan, who had been hoping the new parliament would agree on a new constitution to cement his powers.
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The elections were seen as clipping the wings of Erdogan, who served as premier from 2003-2014 before becoming president last year and is now based in a vast and controversial new presidential palace on the outskirts of Ankara.
Turkish media reports have said that Erdogan will this week give Prime Minister and AKP leader Ahmet Davutoglu the mandate to form the new government.
Should the parties fail to form a coalition within 45 days, Erdogan can then call early elections, an option he has warned he will use should the talks fail.
But Turkish markets, which took a beating in the wake of the polls on fears of instability, will be hoping for a swift resolution to the uncertainty.