Millionaires are not born, they are made. This saying holds true to three of the wealthiest businessmen in the world - Warren Buffet, Mark Cuban, and Jeff Bezos. The amazing thing about these achievers; they started doing menial and unglamorous jobs.

Jeff Bezos

Jeff Bezos was born into a family that crumbled even before he reached five years old. In fact, his surname is not the surname of his biological father because Bezos is the name of his mother's second husband. He was born as Jeff Jorgensen. However, his married separated and his mother married Mike Bezos, a Cuban immigrant.

His first job was at a famous fast food chain as per Business Insider. He worked as a burger flipper at McDonald's. Bezos' very first business was the Dream Institute, an educational summer camp for elementary pupils. His interest in computers led him to start an online bookstore known today as the Amazon.com.

Warren Buffet

Warren buffet started as newspaper boy as per above source. He delivers The Washington Post and at the same time sells soft drinks. Being born a businessman, he bought a 40-acres land at the age of 14 and had it rented for profit.

He was not born poor as his father was a four-term US Congressman. He was rejected at Harvard University but accepted at Columbia where he learned value investing. He is the CEO and largest shareholder of Berkshire Hathaway.

Mark Cuban

Mark Cuban started out as a garbage bag salesman. He sold them to be able to buy a pair of shoes. He grew up in a middle-class family. His father, Norton, worked at an upholstery shop. His grandfather made a living by selling merchandise at the back of a truck. He inherited his love for business and tenacity from his grandfather.

Cuban landed a job selling software, and eventually formed a consulting business, MicroSolutions. Mark Cuban became an expert in the field of computers and computer networking. At present, he owns the NBA's Dallas Mavericks.

Warren Buffet, Nark Cuban, and Jeff Bezos started from small business. It took them years of working hard to become what they are now.