The Supreme Court has rejected the final leave to appeal over the result of the Marriage Equality referendum.
The result of the referendum was challenged separately by Gerry Walshe, an electrician from Co. Clare, and Maurice Lyons, a gardener from Co. Kilkenny.
Both of the legal challenges failed to pass through the Court of Appeal in July of this year.
Earlier, the Government published the Marriage Bill, paving the way for same sex marriage.
The Justice Minister will introduce the Bill into the Dail next week – so that same sex marriages can take place before the end of the year.