Delegates and celebrities converged at the Rome headquarters of the United Nation's food agency to discuss ways of helping the world's hungry.<br/> The meeting, entitled "Food prices - from crisis to stability", took place as World Food Day was marked around the world.<br/> British actor Jeremy Irons was named a special ambassador for the agency.<br/> SOUNDBITE: Jeremy Irons, actor, saying (English):<br/> "We have to listen to the people on the ground and help them in the way they need help."<br/> [Reporter's question: "What does it mean for you to become an ambassador?"]<br/> SOUNDBITE: Jeremy Irons, actor, saying (English):<br/> "A great honour, a great honour to become an ambassador. I hope I will be of some use in some small way."<br/> The UN's Food and Agriculture Organisation (FAO) estimates that globally every day, one billion people around the world go without enough food, of which ninety-eight percent live in developing countries.<br/> Alicia Powell, Reuters.