We all know how bachelor parties can go wrong and be as messed up as only these parties can be. But, what happens with girls night out before the wedding? Did you really think that they are quieter and more peacefull? Maybe, but not this one. The story of this movie begins with getting to know Regan (Kirsten Dunst), Gena (Lizzy Caplan), and Katie (Isla Fisher). They are three best high school friends, but all grown up now. And they are invited to attend the wedding, only they aren't usual guests, but bridesmaids. And the bride is the girl they laughed at in high school- Becky (Rebel Wilson). Becky is plus size and she knows how to carry herself. She doesn't care. The only thing she wants is a great wedding. And as the story goes on, we see that bride and her bridesmaids belong to two totally different worlds. These three bridesmaids only want to party hard and good, not carrying about the bride at all. As they get carried around, lots of hilarious situations happen in the days before the wedding. Will they make it to the isle, with the bride in her wedding dress and all getting along as they should? With a cast that includes Kirsten Dunst, Lizzy Caplan, Isla Fisher, Rebel Wilson, James Marsden, and Adam Scott, you should expect a lot from this comedy piece.