The Alzheimer's Society is planning to capture a million photographs evoking people's memories to support its annual fundraising drive.
The Million Memories website launches tomorrow to coincide with World Alzheimer's Day. It is the first time the society has backed national fundraising events with high-profile online activity.
The site will offer supporters the chance to preserve memories online for a suggested donation of £3. When they upload photos evoking their favourite memories they are each prompted to encourage 10 friends to take part. Memories from comedians Graham Norton and Jo Brand are featured.
"We wanted to develop and refresh our annual sponsored Memory Walks," said spokeswoman Gayle Wing. "We needed to find new audiences, and the website is a simple way for people to show support without a huge commitment."
Richard Turner, new campaigns director at Cascaid, said: "We wanted to take people through the feeling of memory before asking them for a gift."