Ex lovers Cameron Diaz and Justin Timberlake had to hook up once more for 'Bad Teacher'.

The movie centres around a bad mouthed, 'no rules apply' teacher, Elizabeth Halsey (Diaz) who eventually hooks up with Scott Delacorte (Timberlake) amongst her other outrageous antics.

Director Jake Kasdan had the difficult task of reuniting two ex lovers back onto the screen, to get hot once again. Surely this must be the hardest thing to pull off in movie making? Not only did these two have to play it cool, and actually have no rules themselves while doing it, Diaz and Timberlake had to forget that the past happened so that their acting could be convincing.

According to Popeater, Kasdan noted that it was likely "the most uncomfortable sex scene in history". Even though the two had history, they manage to pull it off, and remain good friends till today.

Cameron Diaz Told People Magazine that:

"It was just absurdity, a form of hilarity for all of us involved," …"We went to work that day and said, what time do we start being ridiculous?"

Will this make you want to check out 'Bad Teacher', just for the very bad romance?

Bad Teacher trailer