The lesbian couple who lost a High Court case for recognition of their Canadian marriage have lodged appeal papers to the Supreme Court.
Dr Katherine Zappone and Dr Ann Louise Gilligan are hoping their case will be heard before the end of this year.
In her High Court judgment last December, Justice Elizabeth Dunne found that the Irish Constitution meant that marriage was to be confined to persons of the opposite sex.
She also found that the refusal to permit same-sex couples to marry in Ireland did not breach the European Convention on Human Rights.
