Emma Heming has a heartbreaking update about Bruce Willis. During the new ABC special Emma and Bruce Willis: The Unexpected Journey - A Diane Sawyer Special on Tuesday, the 47-year-old former model opened up about the actor's battle with frontotemporal dementia. He was diagnosed with the progressive brain disorder back in 2023, which affects the frontal and temporal lobes - the areas that are associated with personality, behavior, and language, per the Mayo Clinic.