Mary Fiore (Jennifer Lopez) is the wedding planner. She's ambitious, hard-working, extremely organized, and she knows exactly what to do and say to make any wedding a spectacular event. But, when Mary falls (literally) for a handsome doctor, (Matthew McConaughey), her busy yet uncomplicated life is turned upside down - he's the groom in the biggest wedding of her career! Will she help him walk down the aisle with his internet tycoon girlfriend (Bridgette Wilson-Sampras), or will Mary finally get to be the bride, herself? As this sweet romantic comedy proves, when it comes to love, you can never plan what's going to happen.