The president of the British Methodist conference and other church figures are among thousands taking part in a 'life on £1-a-day' challenge in May.
The Rev Alison Tomlin and others are pledging to join the campaign to highlight the plight of people living in poverty in around the world.
Between 2nd and 6th May 2011, participants will have to buy breakfast, lunch and supper on a weekly budget of just £7.
This is the same sum as around 1.4 billion people living below the poverty line have to survive on for a whole week - that is, £1-a-day.
The 'Live Below the Line' initiative is being organised by educational and campaigning NGO the Global Poverty Project, along with UK-based churches' development agency Christian Aid and other supporters.
Participants are aiming to raise both awareness and hundreds of thousands of pounds to assist anti-poverty projects through sponsorship.
Methodist President, the Rev Alison Tomlin, explained: “I’m committed to continuing to work with and for those who face extreme poverty in any country. I think it would be good for me to experience a tiny part of what it can be like."
“Of course, it is easy for people like me who have choices," she added. 'But in this way we can express our determination to stand alongside those in need.”
To take part in Live Below the Line participants can register at www.livebelowtheline.org.uk/christianaid - where they can also set up their own fundraising pages.