Katherine Heigls comedic timing and delivery and her relentless charm transform this formulaic chick flick into an engaging romp. The Greys Anatomy regular stars as the quintessential always a bridesmaid, never a bride, whose extreme selflessness causes her to plan the wedding of her obnoxious sister to the man she secretly loves. James Marsden plays a disheveled wedding-hater who allows the hopeless romantic to realize that shes a slave to everyone elses needs. Judy Greers excellent supporting performance as the sharp-tongued lush of a best friend adds to the films entertainment value. However, its truly Heigl who steals the show.