Damian Lewis has completely transformed to portray former Toronto Mayor Rob Ford in his next film, 'Run This Town'.

On set in Toronto on Monday, the usually svelte British actor was utterly unrecognizable as he walked around in a fat suit and a thick layer of make-up and prosthetics.

Lewis, the star of Showtime's Billions who broke out in America as Nick Brody on Homeland, was perhaps an unlikely choice to take on the crack-smoking mayor, since the obese Ford was about 150 pounds heavier than him.

Actor Damian Lewis was spotted in heavy make-up and prosthetics to play Rob Ford in his latest film, 'Run This Town'

The 190-pound British actor is wearing a fat suit to portray the obese former Toronto mayor

In an interview with Kit Magazine earlier this month, Lewis (left) said he was being fitted for a prosthetic so he could bulk up his physique to play Ford (right)

In an interview with Kit Magazine earlier this month, Lewis said he was being fitted for a prosthetic so he could bulk up his physique to play Ford.

Lewis said the process takes an entire afternoon and involves 'getting his face and head completely covered in silicon strips, breathing through a small hole near the nose'.

According to its IMBD description, 'Run This Town' is currently being produced in Toronto and follows 'the inner workings of a city seen through the eyes of the interns and assistants that run it'.

‹ Slide me › Lewis is pictured on the left in March 2017, and on the right in costume as Rob Ford

‹ Slide me › Rob Ford pictured on the left in March 2014, compared to Lewis on set on Monday, right

Although many of the details have not been revealed, what is known is that the film follows a reporter, played by Ben Platt, working to expose a politician - Ford - who is deep in scandal.

Meanwhile the politician's aides, played by Nina Dobrev and Mena Massoud, try to handle their boss and keep the story from getting out.

The Hollywood Reporter confirmed the film will take place during Ford's tenure as mayor of Toronto, from 2010-2014.

Writer-director Rickey Tollman says that Ford will be a minor character in the film but that he wants to create 'a sympathetic portrait' of Ford's turbulent political career, a according to CBC.

During his mayorship, Ford was famously captured on video smoking crack-cocaine from a glass pipe and was accused of sexual harassment.

Lewis even sported Rob's signature platinum blonde coif. He sipped water as he walked around set

In several images from set, Lewis is seen wearing a Ford campaign shirt reading 'Ford Nation'

It unclear when the film, 'Run This Town,' will be released

Despite calls for him to resign, Ford refused to step down and even ran for reelection in 2014. However, he dropped out of the race just a month before the vote when he was diagnosed with cancer.

He died two years later from lipsarcoma, a rare form of cancer that arises in fat cells in deep soft tissue, at age 46.

The casting news was not well received by real-life reporter Robyn Doolittle who exposed Ford's scandal. She took to Twitter to slam the decision of casting a male and not a female in the lead role of the journalist.

She wrote on Tuesday: 'I'm glad they're rewriting the fact that it was a female reporter who investigated Rob Ford. Why have a woman be a lead character when a man could do it? Ammaright?'

In response, Ben Platt tweeted: 'I have the utmost respect for your accomplishments- I play a totally fictionalized character, an entitled, incapable entry-level reporter (my boss is played by Jennifer Ehle) at a fictional competing newspaper. The film alludes to the successful reporting from the Toronto Star.'