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On-screen, that is! Sorry, folks - he's still kinda sorta dating Jessica Biel.

Justin Timberlake has just signed on to star in a comedy called Bad Teacher... opposite his former ladylove Cameron Diaz. She'll play a middle school teacher (recently dumped by her boyfriend) who's vying with a rival teacher that's dating the school's model instructor, played by Timberlake.

But isn't this all a bit awk? Apparently, Columbia was eager to work with JT again after seeing his performance in David Fincher's upcoming The Social Network, reports Variety.

We can't wait to see if he and Cam heat things up, even if it's only on the silver screen! Does this sound like a sexy pairing?