Jack Black: iCarly's Newest Guest Star!

Jack Black is the latest celeb to guest star on Nickelodeon’s hit show iCarly!

The 40-year-old actor will play the videogame nemesis of Spencer (played by Jerry Trainor). “The rivals come face-to-face at the show’s version of Comic-Con, Webicon,” EW notes.

Filming starts this week – expect to see the episode this season!

FYI: Last month, Jane Lynch landed a guest spot on the show as Sam (Jeannette McCurdy)’s mom.