Martha Stewart's early career was a mix of jobs: she worked as a model and later as a stockbroker on Wall Street. In the 1970s she started a catering business from her home in Connecticut.
Her first book, Entertaining, came out in 1982, when she was 41. It was a hit and laid the foundation for a magazine, TV shows and a company that went public in 1999, making her a billionaire on paper.