More international celebrities have voiced their support for the 'Yes' vote in next week's referendum.
Presenter Stephen Fry and Zelda Williams, daughter of the late Hollywood actor Robin Williams, have both urged the Irish public to vote 'Yes' on May 22.
QI host Fry, who wed his long-term partner Elliot Spencer in January, said he wished Irish same-sex couples could marry like he did.
The broadcaster, who has been openly gay for many years, tweeted his support as he shared a video of Irish diaspora supporting the campaign.
The 57-year-old wrote: "I wish Irish people the same joy I've found," along with a video of Irish people living abroad entitled Send Love Home.
The five-minute clip was put on YouTube this week by Irish communities living abroad who relate their experiences and encourage a 'Yes' vote on May 22.
Fry announced his nupitals to his partner on Twitter, writing: "Gosh. @ElliottGSpencer and I go into a room as two people, sign a book and leave as one. Amazing."
Robin Williams' daughter Zelda also used social media to lend her support to 'Yes' campaigners.
The actress (25) wrote a heartfelt post on Instagram, calling on the Irish public to say yes to equality.
Tweeting a picture of Harry Potter star Sir Ian McKellan's tweets of support from earlier this month, Zelda wrote: "Listen to Gandalf/Magneto and help spread the word.
"As someone who's grown up with many Irish people in her life, of every orientation (and I'll have yerr guts for garters if you say otherwise), I hope their fight for marriage equality is successful.
"You can do it Ireland. Make history."
After the shock death of comic Robin Williams in August last year, a Dublin woman revealed how Zelda and her siblings played with her children when the actor holidayed in Ireland in the early 1990s.
Monica Kearney told the Herald her next-door neighbour's daughter in Clontarf worked as an au pair for the Williams family in the US.
While the famous clan came to Ireland for a getaway, the young au pair brought the kids to her parent's house and let them play with Monica's children.
"They came and played in the garden. They were really lovely, well-mannered children. They had a great time playing for the day.
"Zelda was a beautiful little girl and she was so nice."
U2 frontman Bono also revealed he's backing the 'Yes' vote earlier this week, speaking ahead of the start of the band's Innocence + Experience world tour in Vancouver.
"Think about it. Trying to co-opt the word 'marriage' is like trying to co-opt the word 'love'," he said.
The charismatic musician (55) argued that marriage is "not a religious institution" and that only the public can decide if they want to marry or not.
"You can't own it. Marriage is now an idea that transcends religion. It is owned by the people. They can decide. It is not a religious institution.
"As far as I know, Jesus wasn't a married man and neither are most priests talking about it.
"It is not a religious idea."