Barbara Windsor has thanked fans for their support as she prepares to visit Boris Johnson at Downing Street.
Sitting at a dining table, Barbara says: "Thank you all so much for showing your support and signing the letter to our new prime minister.
"It means so much."
She finishes by saying: "Let's make this happen and fix dementia care."
The open letter that last month Barbara and her husband Scott Mitchell urged the public to sign, has over 100,000 signatures and will be presented at 12.30pm today (Monday September 2).
Thank you all so much for showing your support.
Dame Barbara is expected to be there in person along with Scott, Alzheimer's Society chief executive Jeremy Hughes, director of policy Sally Copley and carers Nimisha Sharma and Manrata Shukla.
The letter asks the prime minister to sort out the devastating state of dementia care by immediate investment and address long-term reform for the social care system.
Scott added to Barbara's sentiments by saying: "My wife Barbara and I are so proud to be delivering this letter today from the Alzheimer's Society and all the tens of thousands of people who have signed it.
"This overwhelming response from the people across the country really shows the public outrage at the distress caused by our broken social care system.
"I have learnt so much about the struggles that so many people with dementia and their families face every day, just to get access to the care they need, and it simply cannot go on any longer.
"This is a huge opportunity for our prime minister and his government to answer the pleas of the 850,000 people living with dementia across the UK and the millions who are their families, friends and carers.
"We're thrilled to see that the prime minister and his government are committed to this.
"Please don't let people with dementia down. I cannot stress how desperately we need to see immediate action to fix dementia care.
"We need an NHS Dementia Fund in the spending review on Wednesday. Please join Barbara and I in supporting Alzheimer's Society's Fix Dementia Care campaign."
The campaign is calling for a long-term funding solution combined with immediate investment in a £2.4billion NHS Dementia Fund, to be established in the upcoming spending review.
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