The dance scene where Veronica dances with her family to "Everlasting Love" was added in on the spot by Cate Blanchett.
While watching a football match together, Veronica tells the Tattooed Boy that once she met Eric Cantona. Cate Blanchett and Cantona worked together in Elizabeth (1998).
Composer Harry Gregson-Williams heard a boy (Brian O'Donnell) singing on the street for money in Dublin when he arrived to spend a few days on the set of the film. Later, he tracked the boy down again and recorded him singing six or seven folk songs acapella in a quiet alley. Gregson-Williams chose "Fields of Athenry" from the recording and added his own music around the song.
A daily Irish newspaper recently reported that Portlaoise prison (where John Gilligan and Brian Meehan are incarcerated) screens the movie at least once a month in the prison common hall at the request of the prisoners.