Is that you Batman? Christian Bale sports greasy combover and a paunch as he gets into character on set of new film

He was shown on Monday sporting a bulkier frame on the set of his new film.

And it appears Christian Bale's physical transformation didn't end there.

The 39-year-old sported longer hair and a greasy combover, along with a visible paunch as he filmed scenes with Amy Adams for the untitled David O Russell/Abscam project on Thursday in Natick, Massachusetts.

Master chameleon: Batman star Christian Bale was snapped sporting a combover and a paunch on set of his new film with Amy Adams on Thursday in Natick, Massachusetts

The Batman star was transformed to look older than his years in the Seventies-style suit comprised of loose khaki trousers, a white shirt, mustard-colored striped tie and a forest green jacket.

The usually hunky actor was obviously getting into character as he shielded his eyes with rose-tinted aviator shades.

Christian portrays Melvin Weinberg, who was at the center of the FBI's famous Abscam sting operation in the Seventies that lead to the conviction of a number of US congressmen.

Con man: The 39-year-old plays Melvin Weinberg, who was at the center of the FBI's famous Abscam sting operation in the Seventies that lead to the conviction of a number of US congressmen

On-screen couple: The actor was shown chatting and walking with his costar Amy, who plays Maxine Gardner, his mistress and co-conspirator in the movie

Amy looked decidedly more glamorous in a camel-coloured coat tied at the waist over black slacks and a black-and-white striped shirt.

The 38-year-old wore her auburn hair in tumbling curls over her shoulders, and added a rosy glow to her complexion with pink blusher and lipstick.

The mother-of-one plays Maxine Gardner, Weinberg's co-conspirator and mistress in the film.

Sophisticated: Amy looked more glamorous than her costar in a camel-coloured coat, black slacks and a black-and-white striped shirt, with her auburn hair in glamorous curls

Christian is by no means a stranger to losing and gaining weight for film roles. In 2004, he famously lost five stone to play emaciated insomniac Trevor Reznik in The Machinist by barely sleeping and surviving on a diet of coffee and apples.

After his weight plummeted to a shocking 8st 6lbs, the 6ft actor swiftly bulked up again in just six weeks to play the Caped Crusader in Batman Begins after gorging on pizza and ice cream.

He said: 'I overdid it because I was enjoying gorging. I was ignoring advice about taking it slowly because my stomach had shrunk, and I should just go with soups.

'I was straight into pizza and ice-cream and eating five meals in a sitting. My stomach expanded really quickly. I got very sick during that time but I enjoyed getting sick. I didn't mind it at all.

Superhero days: Christian's character is a far cry from his role as Batman in the Christopher Nolan-directed franchise

'In that short amount of time I did actually go from 121 lbs right back up to 180 lbs which is way too fast so that resulted in some doctor visits to get things sorted out.'

Once again, the star dropped 30 lbs to play drug-addicted retired boxer Dicky Eklund in 2010's The Fighter, but he insisted embarking on extreme weight-loss and gain for roles has never been intentional.

He told MTV News: 'I have no goal of seeing if I can become invisible one day, eat so little that I disappear. I didn't take this job because I went, "Oh, there's a physical transformation needed." I always go, "Damn! There's a physical transformation needed!"'

Gaunt: Christian famously lost five stone to play emaciated insomniac Trevor Reznik in The Machinist back in 2004