EXCLUSIVE: Cannes habitués Marion Cotillard and Guillaume Canet hit the red carpet at the festival this evening with psychological thriller Karma , which premieres as a Special Screening, and Deadline can reveal a first teaser. Cotillard stars as a woman with a troubled past whose new life is upended by a child’s disappearance in the drama written and directed by Canet. It marks their sixth collaboration after Little White Lies , Blood Ties , Rock’n Rol l, Little White Lies 2 and Asterix & Obelix: The Middle Kingdom . In an interview with the Deadline ahead of the premier e, Cotillard revealed that Canet wrote the protagonist role for her as she stepped-up work again after a period of focusing on her children. Watch on Deadline “He said, ‘I really want to write a movie for you with a very, very strong character, with something different from what you did before’,” she recounted.…