Factual error: At the beginning of the movie, we find out that Holly and Gerri were married when she was 19. She then turns 30, so at least 11 years have passed since the day that they met. However, when Holly sees Gerri in the pub on the day that they meet, he sings "The Galway Girl". This song was not written by Steve Earl until 2000, and they must have met sometime around the year 1996.
Continuity mistake: Near the start, when Gerry comes back into the apartment after the fight, his suspenders are off, but in the next shot as Holly jumps over the couch his suspenders are on, only to be off again once she's in Gerry's arms. (00:07:30)
Holly Kennedy: Dear Gerry, you said you wanted me to fall in love again, and maybe one day I will. But there are all kinds of love out there. This is my one and only life, And it's a great and terrible and short and endless thing, and none of us come out of it alive. I don't have a plan... Except, it's time my mom laughed again. She has never seen the world... She has never seen Ireland. So, I'm taking her back where we started... Maybe now she'll understand. I don't know how you did it, but you brought me back from the dead. I'll write to you again soon. P.S... Guess what?
Trivia: Hilary Swank was injured during filming when Gerald Butler's suspender belt snapped off and struck her in the forehead. The cut she suffered required several stitches.