Radical left Syriza's party, who has scored an historic success in Greece's general elections, is to form a coalition government with far-right anti-austerity Independent Greeks party.
Talks with Panos Kammenos, leader of the small populist party, lasted less than an hour.
Kommenos told reporters emerging from Syriza's party headquarters: "I want to say, simply, that from this moment, there is a government. The Independent Greeks [party] will give a vote of confidence to the prime minister Alexis Tsipras."
"The prime minister will go to the president and ... the cabinet make-up will be announced by the prime minister. The aim for all Greeks is to embark on a new day, with full sovereignty."
Syriza's leader Alexis Tsipras is to receive a mandate from president Karolos Papoulias to form a government today.
His party won 149 out of the 300 parliamentary seats so it neeeded a coalition partner to secure a working majority. The Independent Greeks won 13 seats.
Earlier, Tsipras pledged to end Greece's "humiliation and pain" after the landslide win.