Executives behind TV hit "Mad Men" are auctioning off a walk-on role on the critically-acclaimed drama to benefit a cancer charity. The show, about life in the advertising world in 1960s New York, regularly features its leading actors, including Jon Hamm and John Slattery, puffing away on cigarettes and auction organizers are putting a twist on this aspect of the programme - by donating a portion of the profits to the Lung Cancer Program at California's City of Hope.

Sandra Stern, chief operating officer at the Lionsgate production firm, says, "The smoking depicted in Mad Men was ubiquitous in the '60s world of Madison Avenue advertising and is a vivid reminder of how far we've progressed in our attitudes toward smoking since then."

Wardrobe pieces worn by Christina Hendricks and January Jones' characters are also being sold off in the 10-day auction on website eBay.com, as well as '60s-style furniture and other props from the hit show, reports Reuters. The sale ends on August 22.