The 30-year-old actress, who is married to Mumford & Sons' frontman Marcus Mumford, wrote a moving opinion piece in her role as global ambassador for the charity Alzheimer's Society.
She also spoke on Radio 4's "Today" programme of how she has sought to maintain a relationship with her beloved grandmother, who has suffered from the incurable disease for 12 years, reported Contactmusic.
"I've certainly had it in my experience that people with my grandmother have gone 'well she doesn't know me. It doesn't matter that I don't visit because she doesn't know me'," she said.
Despite this, the star of Drive and "The Great Gatsby" said that visits are beneficial for dementia sufferers, citing her own experience with her grandmother Margaret.
Disclaimer: No Business Standard Journalist was involved in creation of this content