Image Credit: Getty Images Sophie Kinsella left behind a family after she died in December 2025 following a battle with glioblastoma. The late 55-year-old is survived by her children, and her loved ones broke the news of her death that month. "We are heartbroken to announce the passing this morning of our beloved Sophie (aka Maddy, aka Mummy)," the announcement, which was shared to Kinsella's Instagram, read. "She died peacefully, with her final days filled with her true loves: family and music and warmth and Christmas and joy.