Dave Mullins directed Lou which was released alongside Cars 3. Who directed Cars 3?
Lou (2017 film): Lou is a 2017 computer-animated short film produced by Pixar Animation Studios. Lou (2017 film):  Written and directed by Dave Mullins, it was theatrically released alongside Pixar's "Cars 3" on June 16, 2017. Cars 3:  Directed by Brian Fee, the screenplay was written by Kiel Murray, Bob Peterson and Mike Rich.
Brian Fee