The film tells the story about how the unlikely friendship between former IRA commander Martin McGuinness and firebrand preacher Ian Paisley came to be.

Starrting Timothy Spall as Ian Paisley and Colm Meaney as Martin McGuinness, the film is set before the historic St. Andrews Agreement and tells the story of a car journey where the two one-time enemies were forced to speak in close quarters.

According to The Belfast Telegraph, the script has been written by Co Down author Colin Bateman, who also revealed the film will be in cinemas in May.

Colm Meaney has previously praised the recently deceased Martin McGuinnness as an "extraordinary statesman".

In a statement last year, he said: "I supported him in his candidacy for President of Ireland at the last election because I thought he was the most qualified person to do it. He's proved himself over the last 10 years to be a very astute politician and a remarkably competent statesman, which surprises a lot of people."

Director Nick Hamm said: "We were looking to present a balanced argument where both sides would be equally comfortable and equally uncomfortable."

The film also features one of the last on-screen appearances from John Hurt, who passed away at the beginning of this year.