South Korea's voters cast their ballots in a snap presidential election sparked by the impeachment of Yoon Suk Yeol.

Both Lee and conservative Kim pledged change for a country deeply scarred by a shock martial law briefly imposed by former leader Yoon Suk Yeol.

Lee Jae-myung, leader of the Democratic Party, was elected president following months of political instability in the wake of Yoon Suk Yeol's impeachment