Jonathan Kimble "J.K." Simmons is an American actor and voice actor. He is best known for his roles as Dr. Emil Skoda in the Law & Order television franchise, Vernon Schillinger on the HBO drama series Oz. He also voiced Tenzin in the Avatar: The Last Airbender spin-off series The Legend of Korra, and Kai, the main antagonist of DreamWorks' Kung Fu Panda 3. Terence Fletcher in Whiplash, which he won an Academy Award for Best Supporting Actor. He is also well-known as the current voice of the Yellow M&M in the M&M's commercials since 1996.
For Disney, he voiced Seizaemon in Studio Ghibli's Pom Poko, Martin Smarty in Kim Possible, J.B. in Phineas and Ferb, J. Jonah Jameson in The Avengers: Earth's Mightiest Heroes, Ultimate Spider-Man, Avengers Assemble, Hulk and the Agents of S.M.A.S.H., and Spider-Man: Far From Home (a role he previously played in Sam Raimi's Spider-Man trilogy), Stanford Pines in Gravity Falls, and Mayor Lionheart in the 2016 Disney animated feature film, Zootopia. He also played Siskel in the 1994 Touchstone Pictures film, The Ref, Buffalo Bill Cody in Hidalgo, Garth Pancake in The Ladykillers, Ray Kendall in The Cider House Rules, a souvernir hacker in Celebrity, and Brian in Extract.
- J.K. Simmons is the first actor in a non-MCU Marvel film, to play the same character within the Marvel Cinematic Universe.