Sam Worthington is an undercover action man

Sam Worthington has kept his down-to-earth ways despite his Hollywood success. Photo / Supplied

True blue, straight-talking Aussie Sam Worthington, stars in the worthy political thriller The Debt but insists to Matt Mueller that he's just as comfortable doing a 3D mega movie.

Sam Worthington would like to make one thing very clear. His role as a taciturn, tormented Mossad agent in John Madden's The Debt is not part of some concerted campaign to leave the brawn behind and enter a more cerebral domain. The Debt - and its immediate predecessor on Worthington's CV, Last Night - could be viewed as an attempt by the 35-year-old actor to come across as a more thoughtful male star than the hunky action man who rampaged through Terminator: Salvation, Clash of the Titans and, to a lesser extent, Avatar. But he's having none of it.

"There is no grand plan, mate," he says in his brusque, no-nonsense fashion. "I think my agents have a grand plan but I have final say, so ... People keep saying these are smaller movies. Yeah, the budgets are smaller, but my job doesn't really change, which is to strive for truth in imaginary circumstances. That's it. These are not design choices. I've always said it: you do movies that you'd want to go and see and I don't really care if they're $200 million or $2 million."

The Debt, he explains, came about before Avatar and Terminator: Salvation had made his name, when Madden flew to visit him on the New Mexico set of the failed effort to reboot the Terminator franchise.

"I thought, any man who is willing to fly to the home of green chilli and weaving is a man that I'll give my attention to", the actor grins. "He'd seen Somersault and there was a similarity in the way the two characters held things in that he liked. That's all we really discussed."

In Madden's remake of the 2007 Israeli thriller Ha-Hov, Worthington plays one of three naive Mossad agents (the others are Jessica Chastain and New Zealander Marton Csokas) dispatched in 1965 to East Berlin to kidnap a Nazi doctor responsible for some grisly atrocities and bring him to Israel to stand trial for war crimes; their mission goes hideously wrong and, 32 years later, Helen Mirren, Tom Wilkinson and Ciaran Hinds (Worthington's older self) are still dealing with the fallout of their younger selves' deception.

"We know them from Munich where they're meant to be professional assassins, but in reality they were young, naive, idealistic individuals whose driving force to be part of Mossad was something that had happened in their life," says Worthington. "David's entire family has been wiped out and he's trying to find some closure with that ... I always saw him as a volcano and, when he erupts, it's about him trying to put the lava back in without getting burnt."

Despite now passing muster as a verifiable Hollywood star, Worthington is less obviously groomed than his contemporaries, looking like a man who could happily walk out of his swanky hotel suite and join the construction crew working on the new skyscraper opposite. Before he achieved success as an actor, he was a bricklayer - and his salt-of-the-earth background is undoubtedly part of his appeal. Worthington admits he's not entirely at ease with the trappings of celebrity.

"Every day I consider giving up the business because you put so much on the line, you lose a lot of anonymity; but they're also the things that keep you coming back," he says. "It's like a mate of mine who's on drugs. He knows drugs are bad, but he also likes them. You know going into a movie that it can tear you apart, that you're going to get criticised for it, that you're gonna sit in a room and talk your arse off about it to sell the thing. But it's not that hard talking crap to sell your movie and it's not that hard to make a movie that puts everything on the line and leaves you exhausted and emotionally hurt. That's the rush too."

Apart from The Debt and Last Night, his immediate future will include sequels to his two biggest box-office smashes, both in 3D, albeit with differing results. "I was in the one that got revered and the one that got hammered, he chuckles, adding defensively: "Clash got roasted, but it made half a billion dollars, mate. Prince of Persia didn't do that. You've got to stand pretty proud of that fact, regardless of how bad the 3D was."

Determined to rectify mistakes, Clash of the Titans 2 is shooting with 3D cameras under a new director (Battle: Los Angeles' Jonathan Liebesman) - and with new hairstyling for Perseus. "What can I say?" says Worthington. "Mistake number one was having a shaved head because people cry their arse off about that. So this time I'm gonna have ringlets. Ringlets, man, I'm telling you ... No matter what I do, I'm going to get nailed."

As for the Avatar sequels, they're scheduled to start shooting early next year and will take him out of action for most of 2012 and early 2013. Worthington doesn't mind, calling James Cameron his "best friend" (the two regularly go diving together). "We're all coming back," says Worthington. I know it'll be a year or two years of my life, but I can't think of a better man to spend that with than Jim. I dig him, I love him."

- TimeOut / Independent