Cameron Diaz will co-star in Coen Brothers-scripted remake of the 1966 caper comedy Gambit.  According to THR, Colin Firth will play a "London art curator who plots an elaborate scheme to con a wealthy collector into buying a fake Monet painting. As part of the ruse, he recruits a Texas steer roper (Diaz) to play the part of a woman whose grandfather liberated the painting at the end of WWII."  The roles in the original film were played by Michael Caine and Shirley MacLaine.Diaz recently costarred in The Green Hornet and will next be seen in the comedy Bad Teacher with Justin Timberlake.  Shooting on Gambit is expected to begin this May in London with The Last Station director Michael Hoffman at the helm.