Three New York friends are invited to be maids-of-honour at the wedding of the girl they belittled at high school in this farcical comedy adapted from her own play by director Leslye Headland. When they learn that Becky (Rebel Wilson), the former classmate they called 'Pig Face', wants them to be bridesmaids at her wedding to the hunky Dale (Hayes MacArthur), bitches-about-town Regan (Kirsten Dunst), Katie (Isla Fisher) and Gena (Lizzy Caplan) set out to give her a sending off she'll never forget. When they finally set out on their boozy, drug-induced blowout, however, a mishap with the bridal gown soon derails their plans, forcing them into a riotous night-time odyssey as they desperately try to right the wrong.