Life Mark Twain Prize honoree Julia Louis-Dreyfus: Laughter ‘best medicine’ for her cancer October 22, 2018 Erin Jensen, USA TODAY Comments Off on Mark Twain Prize honoree Julia Louis-Dreyfus: Laughter ‘best medicine’ for her cancer When receiving her Mark Twain Prize at the Kennedy Center Sunday, Julia Louis-Dreyfus shared how humor helped during her battle with breast cancer.