Age: 35
Occupation: TV chef turned food crusader
Previous TIME 100 appearances: 0
Former "Naked Chef" Jamie Oliver, who once slaughtered a live and kicking lamb on television, has become a white knight of healthy eating, using his TV and food know-how to get schoolkids to eat healthier, less-processed foods all while filming his efforts for his many food programs that air around the globe. To little thanks from the city of Los Angeles, which booted his cameras out of the school he was working with.