Two-thirds of Oireachtas members have now given their support to a campaign seeking a retrial for Christy McGrath, the Tipperary jockey jailed in Britain for murder six years ago.
Minister for Foreign Affairs Dermot Ahern has now agreed to meet the campaign committee to discuss the case.
The campaigners are also hoping to have the matter raised in the British parliament.
Christy McGrath (28) was jailed for life in 2001 for the murder of former Newcastle United footballer Gary Walton.
The jump jockey, from Carrick-on-Suir, has admitted assaulting Walton in a late-night row in Coundon but has denied murdering him.
McGrath said he struck Walton in self-defence after Walton had abused him for being Irish.
He said he left the injured man lying in the garden of the pub. The following morning he was arrested, first for grievous bodily harm and then for murder.
He had pleaded not guilty up to the eve of his trial, but then changed his plea, claiming he was told he could receive up to 30 years in jail if he did not. He said he believed he was pleading guilty to manslaughter.
After his guilty plea, it emerged that Walton had died from strangulation and severe facial injuries but McGrath insisted he had not strangled him.
It also emerged that the body was still warm when it was discovered at 7am, whereas McGrath said the fight had happened before 1am.
Two weeks ago British Labour MP John McDonnell tabled an "early day motion" in Westminster on the issue. The motion noted "the wide-ranging and significant support expressed by members of the Irish parliament for the campaign to secure a review of the case of Christy McGrath, a young jockey convicted of murder in the UK; and adds its voice to the growing call for the soundness of his conviction to be re-examined".
An early day motion allows MPs to put on record their opinion on a subject and canvass support from other MPs. George Galloway, Respect MP and recent Celebrity Big Brother participant, was one of the first MPs to support the motion.
