A coat worn by Coldplay frontman Chris Martin is set to go under the hammer to help raise funds for Oxfam's Darfur and Chad appeal.

The singer joins the likes of Corinne Bailey Rae, Sir Elton John, actress Sienna Miller, and artist Tracy Emin, who are all contributing various items to the cause.

Martin is putting forward a black Dolce & Gabbana jacket, while Sir Elton is donating a Donatella Versace suit he wore to his White Tie & Tiara Ball in 2000.

Corinne Bailey Rae is also donating the red dress she wore on the video for her 2006 hit single "Put Your Records On."

The 10-day eBay auction aims to raise $1 million, reports BBC News.

"Try to imagine living in a tiny shelter made out of straw, dry branches, and plastic sheeting with the sun baking down on you at 45 degrees [Celsius]. For most of us that's beyond imagination," said Sir Elton.

"Right now there are 2 million people living in camps in Darfur and on the border with Chad. Oxfam is helping 500,000 people providing basic sanitation and clean drinking water, but to reach more people they need our help."