Killer Joe is a 2011 American Southern Gothic crime film directed by William Friedkin. The screenplay by Tracy Letts is based on his 1993 play of the same name. The film stars Matthew McConaughey in the title role, Emile Hirsch, Juno Temple, Gina Gershon and Thomas Haden Church. Friedkin and Letts had similarly collaborated on the 2006 film Bug.