Ellie Mae Duncan ate her way through her post divorce depression, only to find herself a heck of a lot fatter, and no less unhappy, on the other side. Now, her skinny, gorgeous, and bitchy best friend Katia has asked Ellie to be her bridesmaid, and Ellie is terrified of walking down the aisle dressed in a ruffled taffeta nightmare of a dress at her size. Not to mention, the man she drools over by day and dreams about at night, Levi, sees her as nothing more than a "fat female friend," so Ellie decides once and for all to go on a diet, and this time STICK TO IT. But with a young son to raise, a best friend whose secret talent is an insult in the guise of a compliment, and the two men in her life who both seem so clueless about what she wants, Ellie has to decide if fitting into her bridesmaid's dress is worth it after all...especially when she meets the other bridesmaids, who are all as thin, gorgeous, and bitchy as the bride-to-be.