Justin and Cameron Back Together!

It’s a reunion of the exes…on the big screen now that Justin Timberlake has signed on to join Cameron Diaz in Bad Teacher.

Timberlake will play a substitute teacher, the scion of a watch company fortune, in the comedy co-starring Jason Segel (TV’s How I Met Your Mother) as an irreverent middle school teacher.

Also joining the cast are Molly Shannon and Eric Stonestreet (TV’s Modern Family).

Timberlake recently finished work on David Fincher’s upcoming Facebook movie, The Social Network.

Photo: LiveEarth.org.