Casa Sugar has a great feature on the wedding flowers in Twilight: Breaking Dawn, Part 1. (The one where the vampire finally gets married, natch.) They interviewed Tammy Polatsek, who not only designed the flowers for the wedding, but also the china settings, which you can now buy. A place setting for two is $160, enough china for you and your favorite vampire.
Above, the centerpiece for the tables, is made from delphiniums, sweet peas, viburnum, ranunculus, Australian ferns, and moss.
I do not care one bit about vampires or werewolves, but the wedding for this movie does look quite pretty, with wisteria cascading down from the trees in the ceremony scene.
Related: Harry Potter Herbology 101.