John, who unveiled the poster in the national capital, is the goodwill ambassador for clubfoot, an initiative by Cure India. (Agencies)
"I am fortunate that I have been able to lend face value and help propagate the campaign," John told reporters at the launch of the campaign.
"When they told me, I asked them to use and abuse my image - anything that needs championing of a cause requires us (celebrities) to be there," added the actor who came dressed in a Cure t-shirt.
The actor added that he has learned to be a part of such causes from his parents.
"My mother takes care of children affected by cancer twice a week, feeds stray dogs twice a week and takes care of the aged twice a week," he said.
"My father is an architect and builds homes for earthquake affected people," he added.
John said that he was having a busy week as he was travelling, but "sitting for something like this makes me feel special and rejuvenated.”
John, who unveiled the poster in the national capital, is the goodwill ambassador for clubfoot, an initiative by Cure India.