Bill Hader (born June 7, 1978) is an American comedian, actor, voice actor, producer, and writer who performed the voice of the Referee and the Slug Monster Student in Monsters University, Fear in Inside Out, Stan in Finding Dory, and Axel the Carnie in Toy Story 4 . He was originally also going to play Forrest Woodbush in The Good Dinosaur, before the part went to director Peter Sohn in the final cut. Bill also voiced Flint Lockwood in the Cloudy with a Chance of Meatballs films. For some unknown reason he is not reprising his role as Fear for Inside Out 2 and is being succeeded by Tony Hale