Visible crew/equipment: When Holly and Sharon are showing the apartment to the couple, just as Sharon says, "I think if you offer another hundred grand, they'll back right down," the reflection of a moving boom mic is visible in the center window between Holly and Ted. (00:40:30)
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: In one of the letters that Gerry sends Holly about choosing a future career he says "and there's no such thing as a Vampire Slayer". Funny statement since one of the stars of the film is James Marsters, who is famous for his role as Spike in Buffy the Vampire Slayer.