Colm Meaney (Jerry Lynch) and Ruth McCabe (the "sporty" cougar) played husband and wife in The Snapper (1993) Colm Meaney and Ger Ryan (Maura) starred in The Commitments (1991) & The Van (1996) all three movies were adaptations of Roddy Doyle's Barrytown comedy trilogy set in Dublin. Ger Ryan played Neilí Conroy 's (Helen) mother in the tv mini series Family (1994) also an adaptation of another Roddy Doyle series. None of their characters interact in this movie.
Cillian Murphy, Colin Farrell, Lawrence Kinlan, Owen Roe, David Wilmot, Neilí Conroy, have all shared the screen with Brendan Gleeson. In Perrier's Bounty (2009) In Bruges (2008) The Guard (2011) Michael Collins (1996) Calvary (2014) The General (1998) respectively.
The little girl (Emma Bolger) outside the cafe that Colin Farrell's character robs went on to play Ariel in Jim Sheridan's In America (2002) Colm Meaney played Barreller in Into the west (1992) another Jim Sheridan movie.