Emma Heming Willis, the wife of retired US actor Bruce Willis, has spoken for the first time publicly about how his brain 'is failing him' now and his 'language is going.' The Sixth Sense and Die Hard star, 70, was diagnosed with frontotemporal dementia more than three years ago. Bruce is still very mobile. Bruce is in really great health overall, you know, she told ABC News via Good Morning America on Tuesday. It's just his brain that is failing him. The author of an upcoming book about her family’s experience with dementia, Heming Willis also advocated for fellow carers. The language is going, and, you know, we've learned to adapt, she added. And we have a way of communicating with him, which is just a... different way. The Willis family revealed in 2023 that the star had been diagnosed with frontotemporal dementia, which, according to the NHS website, is 'an uncommon type of dementia that causes problems with behaviour and language.' A lesser-known but deeply impactful condition, it is estimated by Alzheimer's Research UK to affect more than 30,000 people around the country. Heming Willis expressed her challenge in initially taking on caregiving alone, which led to sleepless nights and withdrawal from social life. She hopes her forthcoming book can serve as a guide for other caregivers. She reflected on the moments when the family still experiences Bruce's true personality, appreciating the 'twinkle in his eye.'