The historical American slavery drama 12 Years a Slave has won the Best Picture Oscar at the 86th Academy Awards in Hollywood.

The movie also picked up the Best Supporting Actress award for Lupita Nyong'o and Best Adapted Screenplay for the story, based on the 1853 memoir by Solomon Northup.

Sci-fi blockbuster Gravity took home the most awards, winning seven of its ten nominations, including Best Director for Alfonso Cuarón and almost all of the technical awards.

The 1970s caper film American Hustle failed to win any of the ten awards it had been nominated for.

Dallas Buyers Club actors Matthew McConaughey and Jared Leto picked up Best Actor and Best Supporting Actor awards. 

The film's hair and make-up team won an Oscar for their work, although they had a makeup budget of just over €180.

The best actress award went to Cate Blanchett for her role in Woody Allen's Blue Jasmine.

U2 missed out on the Oscar for Best Original Song for their tribute to Nelson Mandela, Ordinary Love. 

They performed the song during the ceremony, and received a standing ovation. 

The Oscar instead went to the song Let It Go from the Disney animation Frozen.

The movie Philomena did not win in any of the four categories it was nominated in.

There were no Irish winners. 

Click here for more reports, videos and images from the 86th Academy Awards

'We crashed and broke Twitter'

A "selfie" of host Ellen DeGeneres and stars including Meryl Streep, Jennifer Lawrence and Bradley Cooper taken during the ceremony quickly became the most shared photo ever on Twitter.

"We got an email from Twitter and we crashed and broke Twitter. We have made history," DeGeneres said shortly after access to the social media site was disrupted due to sharing of her star-studded picture.

Kevin Spacey, Julia Roberts, Brad Pitt, Angelina Jolie and new Oscar winner Lupita Nyong'o, also crowded into the picture, which was snapped by Cooper after DeGeneres mingled with stars seated in the audience.

"I've never tweeted before!" Streep, a three-time Oscar winner, gushed after Cooper snapped the photo

DeGeneres shared the selfie via her Twitter feed .

It was shared, or retweeted, more than 2 million times in some two hours during the Oscars broadcast.

The photo surpassed the record set by US President Barack Obama's "Four More Years" re-election victory shot.

The picture of Mr Obama hugging first lady Michelle Obama on election night in 2012 has been retweeted more than 780,000 times.

Other widely shared photos from Sunday's Oscars included a DeGeneres selfie with Liza Minnelli, taken after the host made a biting comment about the appearance of the veteran actress and Broadway star.