French Oscar winner and global fashion icon Marion Cotillard turned heads on the Cannes red carpet on Friday night oozing effortless French elegance - and brought her rarely-seen teenage son with her. The porcelain-skinned Parisien star, looking at least a decade younger than her 50 years, was at the French film event of the year to promote her new film Karma, directed by her ex-partner Guillame Canet, who she split from last June after almost 20 years - and with whom she also shares a daughter,