 Model, now actress, Saffron Burrows made her feature film debut in the film, as Gerry Conlon's free love-interest at a commune/squat in London at the time of the bombings.To prepare for the role of Gerry Conlon, Day-Lewis lost over 50 pounds in weight.To gain an insight into Conlon's thoughts and feelings at the time, Day-Lewis also spent three days and nights in a jail cell.