Watch: Celebrity Deaths: 2025's Fallen StarsContent warning: This story discusses assisted suicide. The Kessler Twins have left this world together. Alice Kessler and Ellen Kessler-German twin sisters who performed as a variety entertainment duo-died by joint assisted suicide at their home in Gruenwald, Germany, on Nov. 17, according to the German Society for Humane Dying (DGHS). "They had been considering this option for some time," the association, which advocates for the right to a self-determined death, said in a statement to NBC News.