Canadian director Leah Nelson’s feature animation Tangles : A Story About Alzheimer’s, My Mother and Me got a heartfelt and enthusiastic seven-minute ovation at its premiere in Cannes in a packed Special Screening on Thursday evening. Nelson was accompanied by voice cast members Julia Louis-Dreyfus, Seth Rogen , Abbi Jacobson and Samira Wiley as well producers Lauren Miller Rogen and Vicky Patel and Sarah Leavitt, whose real-life graphic memoir Tangles: A Story About Alzheimer’s, My Mother and Me is the inspiration for the animated feature. The film retells Leavitt’s story as she puts her life as an activist and artist in 1990s San Francisco on hold and returns to her small hometown to spend time with her feisty beloved mother as Alzheimer’s begins to erase her mind and vibrant personality.  The bittersweet tale infused with humor and sadness chimed with the Cannes audience.…