Seán Burke who plays Eric actually has a real life online following with over 1million views of his comedy sketch videos on YouTube.
The street that Eric's family move to in the film is the actual street where Peter Johnson lives (Eric's Dad Jim).
Director Alan Markey, while working as an extra on the 2012 film Byzantium, was once told by Neil Jordan to try not walking into the lead actress on the next take.
The song playing on the car radio at the start of the film is actually a track called 'Not Yet' performed by the Director's first band The Gurriers.