Kate Hudson (Darcy) and Steve Howey (Marcus) also played a couple (who got married) in Noivas em Guerra (2009).
Adam Duritz from Counting Crows has said he never approved the cover version of his song in this movie.
Hilary Swank was cast but dropped out. Ginnifer Goodwin later replaced her.
Darcy and Dex's wedding invitation says the wedding is at The Plaza, which is the same place that Kate Hudson and Anne Hathaway's characters vie to be married at in Bride Wars (2009).
When Dex shows up on Rachel's doorstep and the delivery truck is blocking her view of him, the truck is FedEx, and the only part visible shows "dEx."
Emily Giffin: sitting on a bench next to Rachel and Marcus reading the novel's sequel on which this film is based, "Something Blue."