- J.K. Simmons previously portrayed an alternate version of J. Jonah Jameson in Spider-Man, Spider-Man 2, and Spider-Man 3. This makes him the second actor that resumed a previous incarnation role in the Marvel Cinematic Universe, the first being Lou Ferrigno as the Hulk.
- J.K. Simmons also voiced alternate versions of J. Jonah Jameson in the animated series The Avengers: Earth's Mightiest Heroes, Ultimate Spider-Man, Lego Marvel Super Heroes: Maximum Overload, Avengers Assemble, Hulk and the Agents of S.M.A.S.H., and the video game Spider-Man 3.
- J.K. Simmons also voiced J. Jonah Jameson in The Simpsons and Robot Chicken.
- J.K. Simmons portrayed James Gordon in Justice League. This makes him one of the few actors to date to have appeared in both the Marvel Cinematic Universe and the DC Extended Universe.
- J.K. Simmons is one of the actors to portray characters for both Marvel Studios and DC Entertainment. He voiced General Wade Eiling and Mantis in Justice League Unlimited, Evil Star and Guardian in Batman: The Brave and the Bold.
- J.K. Simmons previously worked with Jon Favreau in I Love You, Man.
- J.K. Simmons previously worked with Jake Gyllenhaal in Rendition.
- J.K. Simmons previously worked with Hemky Madera in La La Land.
- J.K. Simmons previously worked with Marisa Tomei in The Rewrite.
Community content is available under CC-BY-SA unless otherwise noted.