The anti-austerity Syriza party is on course to win a decisive victory in Greece's national elections, a result many political analysts believe will send shockwaves through Europe.
The most recent exit poll projected Syriza to get between 36 percent and 38 per cent of the vote.
Prime Minister Antonis Samaras' conservative New Democracy party is at a distant second, with 23 percent and 27 percent.
Samaras has conceded defeat.
Syriza supporters celebrated the result in Athens, many waving flags or holding placards asking for change in Europe.
"I believe in those of us who