Bridesmaids

Kristen Wiig and Annie Mumolo wrote the script, but director Paul Feig and the cast — which includes Wiig, Maya Rudolph, Rose Byrne, Melissa McCarthy, Ellie Kemper, and Wendi McLendon-Covey — relied heavily on improvisation throughout production. Wiig's background in UCB and Second City shaped the film's comedic sensibility. Bridesmaids became one of the highest-grossing female-led comedies in history and demonstrated the box-office potential of improv-driven ensemble film.