Sandra Bullock and Melissa McCarthy are going to be packing heat. The duo have signed up to do a cop buddy movie. Bridesmaids Paul Feig will direct the as yet untitled project. Katie Dippold of Parks and Recreation acclaim is writing the screenplay. The movie details the strained working relationship between an uptight FBI agent, played by Oscar winner Bullock, and an unconventional Boston cop, played by Oscar nominee McCarthy. The movie is bit of a reunion for Feig and McCarthy, who worked together on 2011 comedy hit Bridesmaids. Feig will executive produce. Peter Chernin, Jenno Topping and Dylan Clark will produce the Fox distributed film. Dippold is repped by WME and 3 Arts. Feig, McCarthy and Bullock are all repped by CAA.