Actors working on dramas such as Game of Thrones and Vikings could be among the cross-border workers affected by Brexit , according to the head of the union representing them.
Speaking at the Irish Congress of Trade Unions conference in Belfast, Actors Equity President Padraig Murray noted that there is currently no restriction on actors, directors or dancers who choose to live or work on either side of the border.
He said many actors from all over Europe were living and working in Dublin, and others regularly travelled to and from the North to work to work on Game of Thrones.
He said a hard border would have a huge impact on members, and up to 20,000 others who cross the border regularly for work or study.
During a debate on Brexit lasting over an hour and a half, not a single delegate spoke in favour of the departure of the UK from Europe.
Unite Regional Secretary Jimmy Kelly was applauded when he warned that Brexit could potentially accelerate a race to the bottom on wages and corporate taxes, and open the door to what he called a rampant Tory campaign to unwind workers rights.
Liam Gallagher, also of Unite, noted that Northern Ireland currently gets a £9bn subsidy over and above its tax base each year for initiatives including skills and education - but said anyone who seriously believed that the UK would honour that subsidy after 2020 would need their head examined.
There was also concern about the impact of a hard border on the 20,000 people who regularly cross the border for work and study.
Incoming ICTU President Sheila Nunan said they were in danger of sleepwalking into Brexit and facing a new European catastrophe with unseen consequences.
She told delegates that the best response to Brexit was to rebuild the European social project, but warned that time was absolutely not on their side.
She described the position of the Tory government was deeply worrying, and said its decision on fisheries was a shockwave for fishermen.
Financial Services Union General Secretary Larry Broderick said Europe appeared to have forgotten about its citizens, adding that Brexit would undermine thousands of jobs.
Esther Lynch of the European Trade Union Confederation said it was essential that Brexit agreements must not facilitate unfair competition, or social, environmental or fiscal dumping.
She said the one hope on the horizon lay with the EU Social Pillar currently being negotiated. However, she warned that employers were actively lobbying to resist it.
ICTU earlier called on the Government to set up a training and income protection fund to assist workers who may be affected by Brexit.
In a new strategy entitled 'Brexit: Time to Rethink the Key Issues' published today, ICTU warned that Brexit must not be used as a pretext to dismantle hard-won rights or protections or to drive down employment standards generally.
It says the best outcome would be for the UK as a whole to remain in both the Customs Union and the Single Market, with zero tariffs, as this would ensure less disruption to all-island trade.
It calls on both the Irish and British governments to support the continued free movement of people on the island, including the mutual recognition of professional qualifications.
It also demands a funding guarantee that any withdrawal of EU funding post-Brexit should be done over an extended period so that funding is guaranteed for at least 20 years after the UK's formal exit from the EU.
The new strategy also urges both governments to bring unions and employers together to develop an "early warning system" to identify at-risk sectors and enterprises and establish appropriate retraining resources and systems.
It says ICTU will work to ensure that any new rights gained for EU member states under the European Pillar of Social Rights will apply across the island.
Finally, it calls on both governments to make a public declaration to the effect that no existing rights or protections will be eroded due to Brexit and that the principle of consent must be upheld across the island.