Video-sharing website YouTube has asked people to document one day - July 24 - of their lives, which will be put together to create the world's largest user-generated film by Oscar-winning directors Kevin Macdonald and Ridley Scott.
The directors want "filmmakers" all over the world to take time out on Saturday to film anything important in their lives and put their contributions on YouTube's "Life in a Day" site for a project which aims to produce a global time capsule for July 24, 2010, Sky News reported.
"Every day, around 6.7 billion people view the world through their own unique lens," YouTube said, calling on as many people as possible to contribute.
The results will be looked at by professionals and edited by Kevin Macdonald into a feature-length documentary, produced by Ridley Scott.
The filmmakers who have their inputs included will be credited as co-directors and 20 lucky contributors will be flown to the 2011 Sundance Film Festival in Utah for the world premiere.
"What I want to do is to make a film unlike any film, I think, that's ever been made before," Macdonald, director of "The Last King of Scotland" and "One Day in September", was quoted as saying.
"It'll be kind of like a time capsule, which people in the future could look at and say: 'Oh my God, that's what it was like.' A portrait of the world in a day."
Ridley Scott, meanwhile, explained what the team were looking for.
"It must be personal. The key, of course, is what appeals to you as the author."
And for the would-be filmmaker, he has some good advice. "There's no excuse. You have a digital camera, go out and shoot your film. Seriously, there is no excuse... just do it."