[attach id=237404 size="medium"][/attach]

Voting for Sunday’s Oscars, the highest honours in the movie industry, closed on Tuesday evening after a big spending campaign by Hollywood studios and the first online balloting system in the 85-year history of the Academy Awards.

More than 5,800 film industry professionals who are members of the Academy of Motion Picture Arts and Sciences were invited to vote in 24 Oscar categories, starting on February 8 and ending at 5pm PST on Tuesday (0100 GMT on Wednesday).

The results will be tabulated at a secret location by accounting firm PricewaterhouseCoopers, who deliver the envelopes with the winners’ names from backstage at Sunday’s Oscars ceremony, televised live from Hollywood.

With the races for best picture, director, actress and supporting actor considered too close to call by awards pundits, movie studios have been blasting newspapers, radio, trade publications and television with promotions for their nominees.

The Los Angeles Times estimated that Warner Bros, the studio behind Argo, and Walt Disney Co., which is distributing Lincoln, had spent about $10 million (€7 million) each in Oscar campaigns in recent weeks. The two films are locked in a tight contest for the top Oscar prize – best picture.

PricewaterhouseCoopers say there has never been a security breach in the secret voting in the 79 years it has worked with the Academy on the balloting process.

This year, the accounting firm faced another challenge – the introduction of online voting for the first time, alongside the option of traditional paper ballots mailed out to Academy members around the world.

“It’s a very robust system with a number of security features,” Rick Rosas, who has worked on the Oscars with PricewaterhouseCoopers since 2001, said of the electronic method. He said more than half of the Academy’s members voted online.