Christina Applegate has become an 'honesty missile' since MS diagnosis Actress Christina Applegate has revealed she's become an "honesty missile'" since being diagnosed with multiple sclerosis (MS). 2 March 2026 Christina Applegate has become an "honesty missile'" since being diagnosed with multiple sclerosis (MS). Christina Applegate has opened up about her health in her new memoir The 54-year-old actress went public with her diagnosis in 2021 and she's now confessed her health battle totally changed her outlook on life and she no longer feels she has time to "be polite".