Jonathan Kimble "J. K." Simmons (born January 9, 1955) is an American actor and voice actor. In television, he is known for playing Dr. Emil Skoda on the NBC series Law & Order, Vernon Schillinger on the HBO series Oz and Assistant Police Chief Will Pope on TNT's The Closer. From 2017 to 2018, he starred as Howard Silk in the Starz series Counterpart.
His film roles include J. Jonah Jameson in Sam Raimi's Spider-Man trilogy and music instructor Terence Fletcher in 2014's Whiplash. He is known for voicing Cave Johnson in the video game Portal 2 (2011), Tenzin in The Legend of Korra (2012–2014), Stanford Pines in Gravity Falls (2015–2016), Kai in Kung Fu Panda 3 (2016) and Mayor Lionheart in Zootopia (2016). He reprised his role as Jameson in various Marvel animated series and video games. He has also appeared in a series of commercials for Farmers Insurance and voices the Yellow M&M.
Simmons's performance in Whiplash received widespread critical acclaim and earned him more than thirty accolades, including the Academy Award, Golden Globe Award and BAFTA Award for Best Supporting Actor.