Is the 4th time Cillian Murphy stars in a film written by Mark O'Rowe. The previous ones are Intermission (2004), Perrier's Bounty (2009) and Broken (2012).
Cillian Murphy and Eva Birthistle have previously appeared together in Breakfast on Pluto (2005) where Birthistle played the mother of Murphy's character.
Cillian Murphy's real-life wife (m.2004) is named Yvonne. In the movie, Cillian's character, Jim, conducts an affair with a woman named Yvonne.
This is the third time Catherine Walker has worked with Mark O'Rowe. She appeared in his 2014 short film "Debris" and as the titular role in his translation of Henrik Ibsen's "Hedda Gabler" which opened in the Abbey Theatre, Dublin in 2015.
In real life, Cillian Murphy has a younger sister named Orla. In the movie, Murphy's character, Jim, ends up with the feisty waitress named Orla, portrayed by actress, Lydia McGuinness. Murphy's wife's last name is also McGuinness.