Wicklow resident Daniel Day-Lewis has claimed the Best Actor Oscar for his role as an oil prospector in 'There Will Be Blood'.
He had been tipped to win the award after previously picking up a series of other industry awards, including the BAFTA and Golden Globe for Best Actor. Listen to Marian Finucane's weekend interview with Daniel Day-Lewis here.
The big winner on the night was 'No Country for Old Men', which claimed four Academy Awards, including Best Picture, Best Director and Best Adapted Screenplay for brothers Ethan and Joel Coen.
The movie's star Javier Bardem also picked up the Oscar for Best Supporting Actor on the night.
The award for Best Actress went to French star Marion Cotillard for her portrayal of singer Edith Piaf in 'La Vie En Rose'.
In her acceptance speech, Cotillard said: "I'm speechless now. Thank you life, thank you love. It is true there (are) some angels in this city."
Tilda Swinton claimed the award for Best Supporting Actress for her role as a lawyer in 'Michael Clayton'. Irish actress Saoirse Ronan was also nominated in the category.
'Juno' writer Diablo Cody was presented with the Oscar for Best Original Screenplay.
Box office hit 'Ratatouille' claimed the Oscar for Best Animated Feature Film.
The Austrian Holocaust-era drama 'The Counterfeiters' picked up the Oscar for Best Foreign Language Film, the first win for Austria in the category.
The Oscar for Best Original Score went to 'Atonement', while Glen Hansard and Markéta Irglová picked up the award for Best Original Song for 'Falling Slowly' from the movie 'Once'. Read more here.
The award for Best Documentary Feature went to 'Taxi to the Dark Side'.
To read a full list of the winners from the 80th Annual Academy Awards click here.
Check out all the style from the red carpet in our Oscars photo gallery here.
Congratulating the Oscar winners, President Mary McAleese said: "I am delighted to congratulate Daniel Day-Lewis on winning the Oscar for Best Actor in a Leading Role, and Glen Hansard and Markéta Irglová on winning the Oscar for Music (Song) at the 80th Academy Award ceremony in Los Angeles last night."
She continued: "2008 has been a tremendously successful year for Irish cinema, as witnessed by the many international nominations and awards already garnered. Last night's achievements at the Oscars are a further sign of the inexhaustible supply of creativity and talent with which this country has been blessed."
The Minister for Arts, Sport and Tourism, Séamus Brennan, congratulated the stars of 'Once' on their Oscar success and also sent his congratulations to Co Wicklow resident, Daniel Day-Lewis, for his Oscar win for 'There Will Be Blood', and Saoirse Ronan for being nominated for Best Supporting Actress for 'Atonement'.
"Being nominated for an Oscar is in itself recognition from your peers in the entertainment and film industry of enormous talent and ability," the Minister said of the teenager's nomination.
The Oscars will be screened on RTÉ Two tonight at 9pm.
