J.K. Simmons – Voice Actor Profile & Notable Roles

J.K. Simmons, born January 9, 1955, in Grosse Pointe, Michigan, is an Academy Award-winning voice actor/actor celebrated for his authoritative, versatile delivery. This legendary performer voices Cave Johnson in Portal 2, Tenzin in The Legend of Korra, Stanford Pines in Gravity Falls, and General Ketheric Thorm in Baldur's Gate 3. His iconic J. Jonah Jameson spans multiple Spider-Man games and animations. Most recently, he reprised Omni-Man in Mortal Kombat 1 (2023) and continues voicing the character in Invincible season 3 (2026), roles distinguished by menacing intensity.