Nicholas Kroll (born June 5, 1978) is an American actor, comedian, writer, and producer. He is known for the FX comedy series The League (2009–2015), creating and starring in the Comedy Central series Kroll Show (2013–2015), starring in and co-creating the animated Netflix series Big Mouth (2017–present) and Human Resources (2022–2023) and the Hulu sketch comedy series History of the World, Part II (2023).

He has also acted or voice-acted in films such as I Love You, Man (2009), Get Him to the Greek (2010), Adult Beginners (2014), Vacation (2015), Sausage Party (2016), The House (2017), The Secret Life of Pets 2 (2019), How It Ends (2021), The Bob's Burgers Movie (2022), First Time Female Director (2023) and Red One (2024).