Marni heads home for her older brother’s wedding when she discovers that he’s marrying her high school arch nemesis. To top that off, her future sister-in-law conveniently forgot all the rotten things she did so many years ago.

Then the bride’s jet-setting aunt arrives, and Marni’s not-so-jet-setting mom comes face to face with her own high school rival.

The movie opens September 24, 2010.