Same-sex couples in Ireland can give full notice of their intention to marry from today.
Those who have already given notice for a civil partnership will be able to marry instead if they choose.
It follows the signing of the commencement order for the Marriage Act 2015 by Minister for Justice Frances Fitzgerald last week, giving effect to the referendum in May, which was supported by 62% of voters.
Since then, 187 same-sex couples have registered to have a civil partnership.
As of today, those who have been married abroad will automatically have their marriage recognised in Ireland.
Meanwhile, the BeLonG To group have reported a 100% increase in the number of people seeking support from its services since the May referendum.