27 Dresses (2008)

After serving as a bridesmaid 27 times, a young woman (Heigl) wrestles with the idea of standing by her sister's side as her sibling marries the man she's secretly in love with. (imdb)
Cast and Information
Directed By: Anne Fletcher
Written By: Aline Brosh McKenna
Starring: Judy Greer, Edward Burns, James Marsden, Malin Akerman, Katherine Heigl, Peyton List, Krysten Ritter, Brian Kerwin, Yetta Gottesman, Charli Barcena, Jane Pfitsch, Alexa Gerasimovich
Country: USA