Scores of Congolese are dancing and cheering outside the electoral commission in the morning after opposition leader Felix Tshisekedi was declared the winner of the presidential election.
This is the first time the vast country has seen a peaceful, democratic transfer of power since independence from Belgium in 1960.
The election had been delayed for more than two years as many Congolese worried that President Joseph Kabila would try to stay in power.
Tshisekedi is the son of late opposition leader Etienne but is relatively unknown and untested. Speculation swirled this week that Kabila's government sought to make a deal as hopes faded for a ruling party win.
The opposition leader and corruption fighter who had led in polling, Martin Fayulu, finished second in the vote.