Long before Bridesmaids convinced studio executives that a raunchy, female-centric comedy could find a huge audience, Leslye Headland was busy adapting her play Bachelorette into a movie. So this isn't a copycat rom-com, but the themes do overlap. Each film turns on a female rivalry: In Bridesmaids, it's between the maid of honor, Kristen Wiig, and the bride's rich friend, played by Rose Byrne. In Bachelorette, the rivalry is more complicated, more ... ugly. It's between the three, 30-ish, unmarried central characters and the bride.