Thelma & Louise actress Geena Davis looked younger than ever as she stepped onto the red carpet at the amfAR Gala Cannes on Thursday night ahead of her hosting duties. The 70-year-old stunned in a white, off-the-shoulder gown with a plunging neckline framed by structured folds that showcased her lithe figure.  Geena brought the drama with a lengthy, voluminous train and completed the look with a diamond cuff and dangling diamond earrings. She wore her brunette locks in stylish, subtle waves down her back and looked confident as she prepared to host the fundraiser.  The star, who has been a staunch feminist and activist for women in film for decades, opened up to The Times about how aging had taught her to accept her beauty.  © Variety via Getty ImagesGeena looked incredible in the plunging gown “It’s a struggle. It’s [always been] a struggle,” she said of having self-confidence. “It’s got much better over the years. I feel like I’ve got more attractive with every decade. Either I have, or I’m feeling better about myself. Which is …