The cast and crew of the Oscar-winning short An Irish Goodbye were given a rapturous reception as they arrived home to Dublin Airport.

Writer-director Ross White was holding the Oscar in the air as he entered the arrivals hall, accompanied by one of the film's two stars, James Martin, who was wearing his leopard print jacket from the night of the ceremony.

The comedy-drama, which is available on the RTÉ Player, won the Academy Award for Best Live-Action Short Film on Sunday, James' 31st birthday.

The Oscars audience sang James Happy Birthday as he accepted the Academy Award with writer-directors Tom Berkeley and Ross White and co-star Séamus O'Hara.

At Dublin Airport, they said the enormity of their success is still sinking in as they casually dropped the names of some of the stars they met along the way at the Elton John and Vanity Fair afterparties.

James Martin and An Irish Goodbye writer-director Ross White at Dublin Airport Photo: Press Association

Belfast native James said he "can't believe" he is coming home with an Academy Award after the film's BAFTA success in London in February.

"It was a really nice birthday present," said James, who made Oscars history as the first person with Down's syndrome to win an Academy Award as part of the Irish Goodbye team.

His "very proud mummy", Professor Suzanne Martin, said she "could feel the love and support from the island of Ireland".

"I'm overwhelmed. It's a bit much to kind of take in, it really is. But honestly, the love we got from the people in LA was just incredible. And that feels good."

Professor Martin, who could be seen at the Oscars ceremony crying as the crowd sang Happy Birthday to her son, once again fought back tears as she spoke of his success.

"He's given a really good account of himself," she said. "He's got a really good work ethic and takes his work very professionally."

She said James and the family are looking forward to a "dream weekend", including meeting President Michael D Higgins and appearing on the St Patrick's Day Late Late Show.

(L-R) Writer-director Ross White, actor James Martin, writer-director Tom Berkeley and actor Séamus O'Hara at Sunday night's Oscars in Los Angeles Photo: Getty Images

Asked how she would top the birthday celebrations next year, Professor Martin said: "I don't know what we're going to do next year and he will be looking for something.

"But nothing will be better than those guys singing Happy Birthday, Colin Farrell giving him the thumbs up, Brendan Gleeson all over it."

Ross White said to be holding an Oscar at Dublin Airport was "a bit daft".

Reflecting on the process of making the film, he said the experience has been "mindboggling".

"When you're making a short film on a wee farm in Northern Ireland, you're not thinking of these kind of lofty heights. And to be with the boys on this man's birthday was just remarkable," he continued.

He said they were overwhelmed when An Irish Goodbye was announced as the Oscar winner.

"The last thing I remember was Paul Mescal giving me a thumbs up in the aisle, which was bizarre," he recalled.

"Then we went up, happy birthday, and the rest was history.

"We've been blown away. It's been a remarkable trip, we had the best time and said we'd celebrate regardless.

An Irish Goodbye is available to watch on the RTÉ Player

"To be back home is great and we're excited to get back up the road to Belfast for another little homecoming.

"I feel like there's going to be a lot of parties - and St Patrick's lines up pretty nicely as well!"

Ross White said he could not believe that he would be bringing the Oscar home to east Belfast and said he was sure that everyone in Belfast would get to hold the Oscar at some stage.

During their Hollywood adventure, the Irish Goodbye team partied with Elton John and attended the Vanity Fair afterparty.

James said Elton John is a "fantastic person who knows how to party" and James Corden is "a good mover".

"He went up to James Corden and asked him, 'Is Jennifer Anniston here as well?' That's who we were looking for. Sadly, we didn't meet her yet," Ross White recounted.

He added that he is working on his third short film with co-director Tom Berkeley, which is due out later this year.

"Then we have to lock ourselves in a room somewhere and work on our debut feature," he said.

"That's the blessing of something like this, it hopefully expedites that process."

James Martin, Ross White and producer Pearce Cullen are looking forward to a big weekend homecoming Photo: Press Association

After his week of living the Hollywood high life, An Irish Goodbye producer Pearce Cullen's parents came to Dublin Airport to surprise him.

Up to their arrival, the Dungannon man had been planning on getting the bus back to Belfast.

"It's been fantastic. It is starting to slowly sink in now that we have touched down on Earth," he said.

His mother Celine said there was still a feeling of "disbelief" in the family.

"To see him standing there in LA, it's just been an amazing journey and it's wonderful to see it come home," she said.

"I hope it's something he will treasure for the rest of his life because I know I will," she added.

Additional reporting: Press Association