Benedict Cumberbatch admits that his new film, "The Fifth Estate," is unlikely to be endorsed by Julian Assange, who he plays in the movie about Assange's WikiLeaks website that opened the Toronto Film Festival, BBC News reports.

"I'm not a betting man, but I reckon he won't particularly want to support the film," Benedict Cumberbatch told reporters.

"I think personally that we show a man and his ideas and his integrity and self-sacrifice," Cumberbatch added.

But Assange is unimpressed with Cumberbatch's performance in "The Fifth Estate," Express reports. He called the actor's attempts at an Australian accent "grating".

"We're all used to foreign actors trying to do Australian accents and it's so grating on the ear," he told The Sydney Daily Telegraph. "When you hear a Brit trying to do an Australian accent and your own accent, I can't tell you how grating it is."

Cumberbatch never had the opportunity to meet Assange, despite portraying him in this new film.

"I didn't have any direct access to Julian. I didn't meet in person," Cumberbatch said at the Toronto Film Festival. "He stated very clearly at the beginning of the project that he didn't want to condone the film because of its perspective, so that was sort of a closed door."

The 37-year-old "Sherlock" star would not give his opinion on how he thought Assange's future would play out. Assange has been at the Ecuadorian embassy in London for more than a year after being granted political asylum.

"Who knows? It's very complicated and I'm not a legal expert," he said.

"I wouldn't want to furnish what I think should or might happen," Cumberbatch said at a press conference held on the morning after his film's world premiere.

"It's to do with dealings behind closed doors for all of us, and I don't have access to any perspective or information that would shine a light on some certain truth.

"What I'd like to see is the man being able to carry on with his work," he went on, BBC reports.

"Beyond that, due process has to take place, in whatever shape or form that happens."

The festival audience seemed to fully appreciate the film, and even gave it a standing ovation as credits rolled at the Toronto premiere, USA Today reports.

The website reports that at the after-party, Cumberbatch and his cast mates hung out, and Deadline's Pete Hammond called the film "this generation's 'All the President's Men.'"

"The Fifth Estate" is released in the UK and Ireland on 11 October, and 18 October in the US.