Nicholas Kroll (born June 5, 1978) is an American actor, comedian, writer, and producer. He is best known for his role as Rodney Ruxin in the FX/FXX comedy series The League, and for creating and starring in the Comedy Central series Kroll Show.

He is the creator of the show and the voice of Nick Birch and various other characters of Big Mouth.

Big Mouth is based off of his childhood/preteenaged year experiences with his best friend Andrew Goldberg.