Former couple will start shooting Bad Teacher later this month

Justin Timberlake and ex-girlfriend Cameron Diaz are to play lovers in a new movie.

The former couple have signed up to take the lead roles in comedy Bad Teacher.

Cameron, 37,will star as a high school teacher who sets out to seduce a substitute tutor, played by Justin.

Shooting begins later this month and Jake Kasdan will direct, reports E! Online.

Justin, 29,and Cameron – who also starred in Shrek The Third together – split in January 2007 after 4 years of dating.

He is now in a relationship with Jessica Biel, 28.  

SEE PICTURES Cameron Diaz and Paul Sculfor enjoy a loved-up day out>>