On the night before an old friend's wedding, three frisky bridesmaids go searching for a little fun, but find much more than they bargained for. Becky (Rebel Wilson), set to marry her handsome sweetheart, and the remaining members of her high school clique reunite for one last bachelorette party in the Big Apple. Regan (Kirsten Dunst), the overachieving Uber-Maid of Honor, Gena (Lizzy Caplan), the smart sarcastic one, and Katie (Isla Fisher), the ditzy beauty, all join the party.