The laws to allow full civil marriage for same-sex couples have completed their journey through the Oireachtas.
The Marriage Bill is now ready to be signed into law next week.
Marriages can then begin as soon as a commencement order is signed, which could take place within a fortnight.
Justice Minister Frances Fitzgerald welcomed what she said was a momentous moment for Ireland.
Grainne Healy is chairwoman of Marriage Equality.
After a lengthy campaign for social change, the journey through Leinster House has been fairly quick.
It first appeared in the Dáil four weeks ago, and it only arrived in the Seanad on Tuesday, where Sentor David Norris urged people to use different terminology from now on.
Watch the moment the Bill passed the final stages:
The moment the Marriage Bill 2015 was passed! #MarRef #YesEquality @YesEquality2015 @marriagequality pic.twitter.com/Vstbwpgwel
— Katherine Zappone (@SenatorKZappone) October 22, 2015
The Marriage Act should be on the statute book next week, and then it is simply up to Tánaiste Joan Burton to sign an order commencing it.
Then all citizens, regardless of sexual orientation, will have full access to civil marriage.
