Flemish liberal Alexander De Croo will be the new Belgian prime minister at the head of a seven-party government, he has announced with his coalition partner Paul Magnette.
"The federal government has been formed," De Croo said at a press conference on Wednesday, while noting that the process had taken "long, too long."
The breakthrough comes more than 16 months after elections, or just under 500 days after the polls.
The new government, he said, will now have to win the population's trust.
"It is up to us to prove that we have our feet on the ground," he said.
De Croo will lead a coalition of seven: a hodgepodge of liberal, socialist and green parties from both parts of the country as well as the Flemish Christian Democrats.
The coalition, dubbed Vivaldi in a nod to the composer's "Four Seasons" to represent the four party groups, is scheduled to take its oath on Thursday morning.
Together, the seven parties won 53.4 per cent of the vote.
"I am convinced that.. We can do much more, that we can give more direction, that we can give more trust, that we can plan more things in the long-run," De Croo said.
With Wednesday's agreement, the Belgian parties narrowly averted breaking the 2010 world record - set by their own country - of taking 541 days to find a government.
The agreement still has to be approved by the parties before then, and by the parliament after a debate following the oath-taking, but this is largely seen as uncontested.
The Belgian political landscape is highly fractured, with a French-speaking south marked by post-industrial decline and a more prosperous Dutch-speaking north, where many demand greater autonomy or even independence.
Since elections on May 26, 2019, several intermediaries threw in the towel over the task of finding a working coalition and the country.
Not in the coalition is the Dutch-speaking centre-right N-VA, which at 16.03 per cent won most votes during the elections.
The difficult match-making has caused exasperation amongst the public and parties, with Flemish politician Conner Rousseau in February calling for everyone to be "shut in a bungalow until there is a coalition."
The government is currently headed by interim Prime Minister Sophie Wilmes, whose minority coalition only held 38 of the 150 seats in parliament. Her government was granted special powers to mitigate the coronavirus crisis, but this mandate runs out on Thursday.