When two weddings are accidentally scheduled for the same day and location, each bridal party is challenged to preserve their family's special moment while making the most of the unexpectedly cramped space. In a hilarious battle of determination and courage, the father of the bride (Will Ferrell) and the sister of the other bride (Reese Witherspoon) chaotically go head-to-head as they stop at nothing to pull off an unforgettable celebration for their loved one ones.