Same-sex marriage is now legally recognised in Northern Ireland.
It becomes the final place in Ireland - or the UK - to recognise the practice.
From today couples will be able to register to marry, meaning the first ceremonies will take place in February.
For couples who are already married, their marriage will be legally recognised in Northern Ireland.
However, it's reported that those already in a civil partnership won't be able to convert it to a marriage.
The British Secretary of State for Northern Ireland, Julian Smith, signed the regulations back in December.
He said couples would be able to marry by Valentine's Day 2020.
The LGBT equality charity Stonewall said it's a "historic day for same-sex couples in Northern Ireland".
Today’s a historic day for same-sex couples in Northern Ireland who finally have the chance to say ‘I do’. This moment is a testament to the tireless campaigning of LGBT people and organisations like @Love_EqualityNI. #ComeOutForLGBThttps://t.co/dXqEnCn5WC
— Stonewall (@stonewalluk) January 13, 2020
