Jamie Oliver is a famous British chef, restaurateur and cookbook author. He became well known for his television shows focused on cooking and promoting healthy eating. Some of his popular shows include "The Naked Chef" and campaigns to improve school lunches in the UK and US. Oliver has also founded restaurants that provide training to disadvantaged youths. Through his television shows and campaigns, Oliver has successfully influenced food policies in Britain and raised awareness about issues like childhood obesity and poor nutrition. He continues working to promote healthy eating habits worldwide.