The wardrobe department reported that their initial designs for the dresses all looked too good on Katherine Heigl because of her figure, and they were hard-pressed to design bridesmaids dresses that would look bad on her.
While Jane and Kevin are in the bar, a Josh Kelley song can be heard in the background. In real life, Josh Kelley is married to Katherine Heigl.
Katherine Heigl is a few months younger than Malin Akerman, who played her younger sister (by several years) in the film.
Prints were shipped to some theaters under the fake title "Wardrobe."
An extra by the name of Hasham Ulhaq, who can be seen sitting on the far table during the bar scene, said in an interview for GQ, "I have watched the film twenty-seven times."