Hollywood's biggest stars gathered in Los Angeles on Sunday for the 86th annual Academy Awards, celebrating the year's top films.

Heading into the awards gala, front-runners include American nominees include the Abscam scandal crime caper American Hustle and 3D space saga Gravity, the searing drama 12 Years a Slave and Dallas Buyers Club, and Canadian director Jean-Marc Vallée's indie drama about a scrappy, HIV-positive, alternative medicine champion.

Check out the attached gallery for highlights from the Oscars broadcast.

Administered by the U.S. Academy of Motion Picture Arts and Sciences, the Oscars are the climax of an ever-lengthening movie awards season and considered Hollywood's most prestigious honour.

The Oscars take place Sunday evening at the Dolby Theatre in Los Angeles and air live on ABC and CTV.