I found out about a month ago that JK Simmons, the voice of J. Jonah Jameson in The Ultimate Spider-Man TV series is the same J.K Simmons who voiced Tenzin in Legend of Korra. Until today I still can't get over this fact.
Apparently he was also the JJJ in the live-action Spiderman movie with Tobey Maguire. Nuts.
I guess he'll stop at nothing to catch this masked vigilante named Spid-amon.