Two Door Cinema Club captured the Choice Music Prize last night and immediately said they would donate the €10,000 prize money to charity.
The three-piece indie rock band from Bangor and Donaghadee in Co Down won the award for best Irish Album of the Year 2010 for their debut record 'Tourist History' released last March.
"This is amazing, we have never won anything ever. We would like to thank our friends and family and our management who have been with us since the very start," frontman Alex Trimble told the crowd in Vicar Street.
The group, enjoying success both here and in the UK, had been tipped to take the prize after their odds fell from 16/1 to 9/1 in recent days.
Journalist Tony Clayton-Lea, who headed the judging panel, said they spent three hours deliberating.
"We went from five down to three and then one," he said.
Two Door Cinema Club faced stiff competition from Villagers, who were nominated for the UK's Mercury Music Prize last year.
Former Smiths singer Morrissey and GAA star turned fashion guru Paul Galvin were among the packed audience.
"I'm a huge fan of the Villagers' album," said Galvin.
Conor O'Brien of Villagers had joined Davey on stage during her set.