EXCLUSIVE: Jane Fonda, in Cannes to make an appearance for L’Oreal, has just joined the cast of the comedy Better Living Through Chemistry. She joins Sam Rockwell, Olivia Wilde, Michelle Monaghan, Ray Liotta, Ben Schwartz and Ken Howard in the film. She plays a customer of the pharmacy run by Rockwell’s character, and her character is the conscience of the film. David Posamentier and Geoff Moore wrote the script. It is an Occupant Entertainment production, produced by Joe Neurauter and Felipe Marino. Filming is underway in Maryland, and Fonda will shoot her scenes when she returns from Cannes.