After years of wrangling, Chile has finally allowed marriages between people of the same sex after the Chamber of Deputies approved the law on Tuesday.
A total of 82 parliamentarians voted in favour of same-sex marriage, 20 against and two abstained.
The Movement for Integration and Homosexual Liberation (MOVILH) called for a victory celebration in the centre of the capital Santiago de Chile.
Until now, homosexuals in Chile could only enter into a registered civil partnership.
In Latin America, same-sex marriages are already possible in Argentina, Brazil, Colombia, Costa Rica, Ecuador, Uruguay and parts of Mexico.
The ultra-right presidential candidate Jose Antonio Kast is a staunch opponent of same-sex marriage.
The son of German immigrants and father of nine children, is running against left-wing former student leader Gabriel Boric, in the run-off election on December 19.