Viewers of a new show will be asked to help decide how £10 million of lottery money will be spent.
Channel 4 bosses want to start a national debate to help the Big Lottery Fund pick five projects around the UK to benefit from the cash.
The channel's chief creative officer, Jay Hunt, said: "For the first time people will be able to influence which aspect of community life in the UK could benefit best from this huge sum of lottery money. This series will provide a fascinating insight into what people care about most passionately and provide the opportunity to make real changes for the better."
The five-part Channel 4 series, which has a working title of The Big Decision, will be shown next year.
Chairman of the Big Lottery Fund Peter Ainsworth said: "The public have raised billions for good causes by playing the National Lottery and with this programme we want to spark a nationwide debate on the best use of lottery money and the themes that best represent the needs and aspirations of this decade.
"By telling us what really matters to them, the public will have a real say in where £10 million of Big funding will go next year."
