Fred De Luca; Start Subway Sandwich in 17 years old

 In 1965 Fred De Luca borrowed just $1,000 to start the now-famous Subway sandwich restaurant. Fred was only 17 years old when he decided to be an entrepreneur, and he started the restaurant as a way to earn money for college. Since opening the first shop in Boston, the chain now has 32,401 locations and makes over $9 billion in sales yearly. Fred and his co-founder Peter Buck have also founded Franchise Brands, a resource to help franchisors and entrepreneurs grow their brands.

(inspired by americanexpress)