To make Chris O'Donnell appear to be much taller than Minnie Driver than he really is, she had to walk in a ditch when they were filming the scene of their stroll in Knockglen.
The Long John Jump Band, who performed on the soundtrack and in the ballroom scenes, is fronted by John Sheridan (wearing a red suit jacket in the film). John Sheridan is the younger brother of Irish director Jim Sheridan.
When Benny and Eve are walking down the street near the beginning of the film, the local butcher comes out of his shop holding a cleaver in his hand. In the immediate next shot, both of his hands are tucked into his apron with no cleaver in sight.