Justin Timberlake & Cameron Diaz: Laughing Ex-Lovers

Cameron Diaz shares a few good laughs with her ex (and current co-star) Justin Timberlake (wearing Oliver Peoples “Riley” glasses) on the set of their new movie, Bad Teacher, on Wednesday (April 7) in Irwindale, Calif.

I’m sure Cameron, 37, and Justin, 29, are consummate professionals when it comes to acting, but is it really wise to work with your ex’s?

Watching their on-screen chemistry will be quite interesting when the movie comes out in 2012!

FYI: Cameron is wearing a 291 Venice cashmere v-neck sweater.

15+ pictures inside of laughing ex-lovers Justin Timberlake and Cameron Diaz…