The Vanity Fair editor played by Isabella Rossellini mentions that Peter's interviewees will meet him at The Big Cup. Those interview scenes were filmed at the real Big Cup, a coffee shop in the Chelsea neighborhood (at 228 Eighth Avenue) that, before its 2005 closing, was a popular gathering for Chelsea's gay community.
The poem that Diana lovingly recites to Isabel when they are sitting on the steps near the end of the movie is from Edgar Allan Poe's "Annabel Lee," with Diana substituting "Isabel" for "Annabel." Eight lines are spoken from the poem, but not in order they were written: I was a child and she was a child, In this kingdom by the sea: But we loved with a love that was more than love - I and my Annabel Lee. For the moon never beams without bringing me dreams Of the beautiful Annabel Lee; And the stars never rise but I feel the bright eyes Of the beautiful Annabel Lee.
James Marsden and Elizabeth Banks later reunited in Walk of Shame (2014) but they couldn't repeat the success in Heights (2005).